Ensign Wasps are small black insects that look a bit like spiders with wings. They do not sting but are useful because they kill cockroaches.
Although an enduring symbol of the American southwest, the roadrunner isn't as common as you might think. If you haven't had the good fortune to have one run across your path, here's an introduction.
Dinosaurs Alive is an exhibit consisting of large, animatronic animals. This article contains photos of some of the models and facts about the real animals.
A short explanation of the protocol for quantum teleportation, a quantum computing technique for transporting qubits over large distances.
The black vulture and the turkey vulture are often called "Buzzards." These birds are anything but Buzzards. Buzzards are European birds related to Eagles. Vultures and condors differ from buzzards.
Pacific white-sided dolphins are intelligent and very social animals. This article describes the lives of the wild dolphins and of some rescued animals in captivity.
Snakes are fascinating reptiles that have a wide variety of appearances and behaviors. Some snake characteristics are both strange and surprising.
Surface tension increases the tendency of the alveoli to collapse. Surfactant decreases the surface tension in the lungs and thus decrease the work of breathing, minimizes collapse and oedema.
Considered by Einstein to be his "greatest blunder," it in fact may describe the mysterious expansion of the universe.
An awfully subjective topic, but take a look and see if you find something you never knew existed. Our solar system has plenty to look at.
Inspired by its predecessors, the Cassini-Huygens mission aims to solve many of the mysteries surrounding Saturn.
Getting kids interested in science can be hard. Here are a few fun science experiments that are simple enough for both kids and adults to enjoy together.
Do you usually wonder what the Moon is made of? Well, read about the surface features of the moon and their importance. See also the facts about the components and parts of the lunar.
The matter around you is composed of atoms but if we delve deeper we can find subatomic parts made of quarks and gluons. But they don't work according to our current understanding of physics.
A simple explanation of Albert Einstein's theory of special relativity and its effects on our understanding of space and time.
Some sunscreens contain tiny nanoparticles that may be detrimental to health. English ivy produces nanoparticles that may make a safer sunscreen.
It may read like science fiction, but these fascinating examples of insect behavior come from the dedicated study by the late Thomas Eisner, the Father of Chemical Ecology.
Living in America's Midwest, you may encounter these venomous snakes on your travels. Learn more about these creatures and what to do if you encounter them!
Plants are a fundamental part of the existence of life. They utilize the energy of the sun in conjunction with inorganic compounds to manufacture carbohydrates and create biomass (Freeman, 2008). This biomass forms the basis of the food web as we...
At first glance, the names of the muscles of the human body looks difficult to learn. These names are derived from Latin. Muscles names can actually be used as a short cut to learn a muscle's location, shape and it's function.
See pictures to help you identify the male and female Rose-breasted Grosbeak, plus learn facts about its migration and behavior.
In this article, we'll look at the derivation of Albert Einsteins famous equation E = MC2 show how you can come up with it using simple algebra and Pythagorean's Theorem.
In 1905, Albert Einstein published four groundbreaking physics papers and announced his genius to the world.
Gamma Ray Spectroscopy - An introductory review of germanium gamma ray detectors, and the spectroscopic methods used in the measurement of x-ray escape peaks, annihilation photons, peak summing, energy resolution, and total and photopeak efficiency.
Ice plant is a succulent that is common in Tenerife. It gets its name because of the tiny crystals that cover its leaves and stems.
The average zoo visitor may wonder what it is that tigers eat in zoos. It is the same as in the wild...meat. In the zoo however the fare varies as does the preparation and presentation.
Learn all about the Black-capped Chickadee, the brave and spunky little backyard songbird who wears a mask!
You are walking down the road when, "eek!" you fall into a huge pool of quicksand. There is nobody near enough to hear your cries for help. How will you escape? Can you really drown in quicksand? How can your practice escaping from quicksand from the safety of your own home? This recipe for Cornstarch Quicksand is very similar to the real thing, it is easy to make, and it even lets you walk on water.
Why are mountains some of the most landscape-sensitive areas in Slovenia? What are the best measures for conservation and sustainable development, in these areas?
Two amazing phenomena in nature are the annual migration of millions of red crabs on Christmas Island and the "everlasting" Catatumbo lightning in Venezuela.
Also known as the guigna, the kodkod is the smallest wildcat in South America and perhaps the world. Learn about this fascinating animal and how to tell it apart from its neighbor, the Geoffroy's cat.
The Cape buffalo, also known as the "Black Death" or "widowmaker," kills about 200 people per year. However, two people have shown that it is possible to befriend this animal.
If you're like most people, you have no idea what goes on behind closed doors of your local hospital laboratory. Find out from a Medical Lab Technologist how the labs work and what lab techs do.
Instead of irregularities in Earth's orbit, temperature changes are now caused by changes in atmospheric greenhouse gasses released by human activity, primarily the burning of fossil fuels.
Students use different methods for retaining information. Know your learning style and maximize your potential. Includes an aromatherapy recipe to aid memory.
This is an example of a proposal for addressing a clinical issue. The topic is the use of wearable devices for reducing fall risks in geriatric patients.
While there were many misses in this field, they deserve recognition as steps towards a sound method for exoplanet hunting.
The frilled shark is a strange, deep water shark with a wide head, a huge mouth, and a long, eel-like body. It’s caught as bycatch and is near threatened.
The precision and accuracy of two-pan balances reached maximum efficiency when the Scottich Chemist Joseph Black (1728-1799) introduced a 'knife edge' as the fulcrum to an already ancient design.
The only naturally occurring poisonous spider in Maryland is the Black Widow spider. Learn how to identify several other spider species, their habitats, behaviors, and what you can do to deter them.
Due to my studies of human survival in space, I have a huge interest in researching what life is like on the International Space Station.
A black hole is a region of spacetime centred on a point mass called a singularity. A black hole is extremely massive and thus has an immense gravitational pull, which is in fact strong enough to prevent light escaping from it.
Hurricane season officially lasts until late November. Though the last six weeks are not overly abundant with these storms, deadly hurricanes can still occur in October, November, and even December.
Marine compounds that were once known to be toxic to humans have now become life-saving drugs. Many of these are used either as anticancer drugs or to relieve pain in cancer.
A quadrant is a quarter of a circle. So to work out the area of a quadrant, first work out the area of the whole circle (use the formula A = π ×r²) and then divide the answer by 4. Alternatively, you could substitute the radius of the quadrant...
So many space missions are never realized because of finances, politics, or technical limitations. Galileo somehow faced all of these and came through with some amazing science on Jupiter.
Earth has its own share of "unworldly" happenings that even science cannot explain. Some are similar to biblical phenomena that people will not believe easily. But these are real and they exist!..
This article looks at ten sandy beaches of extraordinary colour, what they are composed of and how they are formed, with illustrations of all ten
The largest leaves in the world belong to Raphia regalis, a species of Raffia Palm native to parts of Africa.
From their host-finding antics to their survival skills, ticks are amazing creatures. In some ways, they're practically superheroes of the insect world (evil superheroes, that is) with a thirst for adventure and some, well ... pretty incredible super-tick powers.
The vapourer moth is the opposite of the ugly duckling: beautiful caterpillars turn into the ugliest female moths you'll ever meet. The males are quite pretty, though.
Broca's area, Wernicke's area, and the circle of Willis are important parts of the brain. They are named after the famous scientists who discovered them.
Surfing the web affords us the opportunity to learn about things that we may be confused about, such as leucistic and albino animals. Some mistakenly assume all white animals have albinism.
Galileo, the great prototype for all scientists, made many discoveries in physics and astronomy. But whose work did he build off of?
Man has always been fascinated by the sky. Yet space exploration in earnest did not begin until the 20th century. A recap of man's remarkable achievements in search of new frontiers.
Is the universe a one-time event that worked perfectly, or had it failed many times until the universe we now live in?
The study of exoplanets is a relatively new, and exciting, field of astronomy. What are the main techniques used by astronomers to discover these new planets?
Common Snapping Turtles are perfectly adapted to their environment. Their ecology has worked successfully for them for 40 million years.
Trig graphs are easy once you get the hang of them. Once you learn the basic shapes, you shouldn't have much difficulty. The main problems A-Level students have, in my experience, are: Remembering which is y = sin x and which is y = cos x....
Exploring the incorrect theories of lift and describing what really happens to an aeroplane wing in the air...
Take a closer look at microscopy! Learn the differences between an electron and light microscope, know your resolution from your magnificaiton and learn how to correctly use a microscope.
Due to the threats encountered by mountain gorillas, it was once thought that they might be extinct by the end of the 20th century. Conservation efforts are helping the species to recover.
Volcanic eruptions are a stunning sight. But how do they happen? Learn more about the science of volcanoes and volcanic eruptions in this article.
The Fermi Paradox asks why it appears we are alone in the universe when the probability of alien life seems so high. Where are they? Where is everybody?
Many people accept Go Green at face value. Let's get some perspective on 150 years of conservation, preservation, ecology & green action & learn.
A summary of the key topics in nuclear reactor physics and a look at the worst nuclear accidents (Chernobyl and Fukushima).
Already a complicated subject, black holes get even weirder when viewed through the lens of string theory. Read on for some odd possibilities for what black holes really are.
Rhinos were once widespread in parts of Africa and Asia, but now they are considered to be endangered.
Lions declared endangered in 2015. Read about African conservationist Kevin Richardson and who the main culprits are for the demise of the endangered African lion population.
Snow leopards are currently endangered due to various threats, but efforts are being made to save the species.
Blue Jays are not only clever mimics, but highly intelligent birds that love day old bread. They have the reputation for being bully birds, and rightly so. But I don't think there's a prettier sight in the middle of winter than blue jays and cardinals in the snow!
How do we measure the distance to far away objects? A tough talk for sure, and the history behind the theories involved are just as interesting.
Most venomous snakes can be quickly distinguished from other non-venomous snakes with a practiced eye. They share characteristics that will readily stand out once you've come to recognize them.
Chemistry can be a very difficult subject to grasp, but is essential for understanding how the world around us truly works. To truly understand Chemistry, one must start with the basics.
Once you've managed to overcome your fear of spiders, they turn out to be fascinating creatures. Here's 8 unusual facts about these arachnids.
Dark matter and dark energy are still huge mysteries in astrophysics. Alternate theories exist to help explain them.
Some sharks produce beautiful patterns of light in a process called biofluorescence. The light emission may have important functions.
There's a lot to know about chipmunks—the cute little animals that people love to watch and photograph, but hate when they start digging up a garden or burrowing holes near a house's foundation.
Decades ago, in 1982, the World Meteorological Organization chose the name Sandy in their alphabetical list of named Atlantic storms, never knowing that this would become a storm of immense proportions that would affect much of the eastern seaboard,...
A summary of the major organelles and functions of the animal cell. A simple explanation of how to draw an animal cell.
With our home planet, Earth, growing ever crowded, we need to start searching for solutions. One solution is to terraform another nearby planet. Can people live on Mars? Is that the solution?
The Eastern Wolf is especially rare, found only in and around Algonquin Provincial Park in Ontario. This article includes facts, photos, and chilling video of an Algonquin Park public wolf howl.
The Earth has an exceptionally large moon compared to the size of other planets' moons. Start exploring the celestial sphere by observing our beautiful natural satellite.
Dinosaurs get all the glory. Their appeal often overshadows other species that existed with them. Non-dinosaur fossils reveal rare glimpses into reptiles, birds and mammals when T. Rex ruled.
The special theory of relativity is a theory by Albert Einstein, which can be based on the two postulates Postulate 1: The laws of physics are the same (invariant) for all inertial (non-accelerating) observers.* Postulate 2: In a vacuum the speed...
Recently, scientists have become concerned about the celestial movements of asteroids and comets—so much so that they have set up several observatories around the planet to track these objects.
Own your talents! Don't hide them. Being smart and having a passion for science, technology, engineering and math is in vogue. STEM is hip and happening, so spread the word: Nerd Is the New Awesome.
These distances are measured in degrees and radians. The angular diameters of these objects are normally very small; therefore, it is better to represent them in degrees, arcminutes and arcseconds.
The Jerusalem cricket is an interesting insect with bizarre looks that can be pretty frightening, but as long as you don't provoke them unnecessarily, they won't bite - and they aren't poisonous.
Glaciers are increasingly in the news because they are an important factor to consider in global warming. It's important to know the basics!
Have you ever thought about how nice it would be to travel back in time to repair bad choices? Perhaps you've dreamed of seeing someone from your past? According to scientists time travel is possible.
Wolbachia is a bacterium that infects mosquitoes. It prevents viral replication in its host and may protect us from dengue, Zika virus disease, and other illnesses.
Talking about the early Universe is a difficult proposition, with so many competing factors we have to take into account. Then throw in inflation, black holes, and holograms and we got complexity.
Titanoboa may be the world's largest snake of all time. Let's see if this monstrous beast could still exist in places such as the South American rainforest.
Sedimentary rocks are fantastic formations that each and everyone tells an amazing history! If we know what to look for, we can read about the fascinating journey the particles in the rocks have done....
The common chameleon is the only species of chameleon that lives in Europe and it can be found in Portugal and Spain. It lives in the Algarve area of Portugal but is threatened by habitat loss.
Japanese volcanoes are as beautiful as they are deadly. Here are 7 famous Japanese volcanoes that have inspired fear and love throughout the centuries.
Dark matter is one of the current mysteries in physics. We don't know what it actually is so how do we know it's there?
There are now many invasive insect species in Britain, and they can have a big impact on the environment. So let's have a look at what damage they cause and how they are affecting native species
Introduction The science of remote sensing has emerged as one of the most fascinating subjects over the past three decades. Earth observation from space through various remote sensing instruments has provided a vantage means of monitoring land...
Are you familiar with the term biological arms race? No, the term does not refer to a race to concoct the most potent biological weapon. So then what is a biological arms race? Well, the term refers t
Need help with trig homework or a review of the basics? This article explains in plain English how to visualize the unit circle as just a set of triangles, how a sine and cosine work, and radians.
There are many reasons why mosquitoes bite some people and not others and this article will address several of those, such as the pests preferring blood Type O over all other types.
Discover a side of Minnesota you might not know about: flowers! 11 flower images and information on what they are and where they grow, including a short video. Take a poll at the end to vote for your favorite.
Whether for professional or academic purposes, choosing a model organism for experimentation can be a tough call. Here are some points about why zebrafish might be the animal you're looking for
The nth term of a number sequence is a formula that gives you the values in the numbers sequence from the position number (some people call it the position to term rule). Example 1 Find the nth term of this sequence. 5 8 11 14 17 First of...
This is the fourth page of a series of guides to the night sky for beginners. Here, I look at the most prominent objects other than our Moon and the stars, which can be easily seen in the night sky.
The complete guide to British birds continues with a look at the various species of dabbling ducks that inhabit the British Isles. A dabbling duck is basically a surface feeding duck.
The animals of the sea are playful and beautiful in their own special way. Learn about these remarkable aquatic animals - some of the largest in the world - manatees and dugongs.
Cosmological mysteries are numerous, incredible in size, and the possible explanations for them are just as bountiful. Let's explore the supervoid, one of those mysteries, and see what it could be...
A poor defenseless gummy bear, a test tube full of liquid potassium chlorate, and a couple of slightly mad scientists; seems like the perfect set up for some absurd B-movie horror flick, does it not? Well, not quite. It is more along the lines of...
You may have heard of many famous twins, long-lost twins, and Siamese twins, but none are quite like our Ronnie and Donnie Galyon.
Earth will one day be rendered uninhabitable, and humans will move forward in colonization and terraforming efforts. Here we debate the ethical dilemmas and relevant laws and policies.
In addition to serving the function of respiration, the respiratory system is involved in providing immunity, in olfaction, in phonation, as a reservoir and a filter for CVS and as a metabolic ground
Don't let mind readers and magicians mess with your mind with number tricks. Learn their secrets and beat them at their own game.
The bird family Alcidae evokes images of cold, windswept, ocean escarpments or upwellings miles out to sea. The Pigeon Guillemot, however, is the "Easy" Alcid of tourist traps and public beaches.
Many songbirds are known for their colours and sweet melodies. Listen to the songs of beautiful songbirds and learn how these melodies function in courtship and registering territorial presence.
There is a lot going on in the night sky. Take a look with a discerning eye and be amazed at the celestial entertainment above.
If you find it difficult to convert between Fahrenheit and Celsius, it may be because you are a right-brain learner. Here are visualization tips to cement the differences between degrees F and degrees C in your mind.
For more than six decades in the Middle Ages a mysterious disease swept through England killing thousands.
Known for the ability to find alien worlds, the Kepler Space Telescope has changed our way of thinking of the universe. But how was it built?
The U.S. space program has chosen a second group of astronauts to fly to Mars. In June 2017, NASA had 20 adventurer-scientists training for the journey. It is an exciting time!
Einstein has been verified time and time again. Want another test or two? Then let us push it to the extreme just like Gravity Probe A and B did.
Scores of people tinker in basements and garages trying to make the next big thing; sadly a lot of the effort only produces strange inventions that nobody needs.
Here is a lab report example with step-by-step instructions on writing a good lab report. When writing a lab report you are presenting scientific facts that support a hypothesis, to an audience.
Though largely abandoned, the idea of a missing planet or asteroid field between Mercury and the Sun continues to intrigue us.
The State of New York has a beautiful array of mushrooms and other fungi growing among the oak, maple, and beech forests. This photo gallery of orange and yellow mushrooms was taken in Frewsburg, a town in the "Southern Tier" of Western New York. Many of these mushrooms can be found in the wider Great Lakes geographical area.
What snakes live in Indiana? Are any of them venomous and/or dangerous? There are nearly 40 different species and subspecies of snakes that can be found in the Hoosier state. Although three out of the four front-fanged venomous snakes are endangered (Timber Rattlesnake, Cottonmouth, Eastern Massasauga Rattlesnake) and hard to find, the Copperhead is not. Although many Hoosier snakes are rear-fanged venomous, their venoms don't pose a significant threat to people.
For high-grade worry warts there’s now a way to determine just what will happen if their community is hit by a space invader.
Ballistics is a branch of mechanics which deals with the motion of projectiles launched into the air or space. Solving these type of problems involves using Newton's equations of motion
While in flight, at the nectar feeder, fending off intruders, or enjoying a rain shower on a hot summer day, Ruby-Throated Hummingbirds constantly communicate and vocalize. Read about these ‘songs’ and you will begin to hear your hummers with different ears.
A simple, step by step guide about how to find the Pearson's correlation coefficient, r, and how to calculate the coefficient of determination on your TI-89 calculator.
This is the third page in a series of guides for anyone who wants to learn a little more about our night sky. This page looks at those most numerous of all objects visible in the night sky - the stars
Formosan termites may not worry about moth holes in their sweaters, but they are the first insects discovered to fumigate their nests with naphthalene. Scientists have discovered that termites, like the Formosan Subterranean Termite (Coptotermes formosanus), produce naphthalene - a hydrocarbon - which they apparently use as a defense against natural enemies, such as ants. People use the compound to rid human nests of carpet beetles and clothes moths, and to repel intruders such as bats and star
Real Green solutions come from deep thinking about the causes of problems we created over centuries. Natural crises have deep roots in human actions.
Several U.S. universities operate outdoor sites where human bodies are left to decompose naturally to aid forensic investigators.
The relationship between temperature and volume is described by one of the pieces of the ideal gas law, also called Charles's law.
Space exploration is dangerous business. Despite hard training and dedication, these ten astronauts perished before making it into outer space.
A starfish ripped into pieces can grow a new starfish from each piece. What more could you possibly want to find the perfect science nonfiction monster living among us? Find out here.
Bacteria naturally develop resistance to antibiotics, and the unnecessary use of antibiotics in meat production and the treatment of human disease is accelerating this process.
Green, huge caterpillars in Arizona gardens have many enemies not the least of whom are the gardeners. If these hornworm caterpillars survive and pupate, they become moths with hummingbird skills.
Figuring out how the moon was created is one of the deepest mysteries of archeological astronomy. We do have ideas though...
Did you know that the peacock actually refers only to the male of the species known as the peafowl. Additionally, the peacock's train is used to attract mates and makes up more than 50% of the peacock's size. Learn more great facts about the peacock in this article.
In this article I want to use a specific polynomial equation to introduce the Whittaker method for finding the root that has the smallest absolute value.
Bulk flow of air in between the environment and the lungs is an important respiratory function. Coordinated, active movements of the thorax and the diaphragm, result in inspiration and expiration.
It might be easy to overlook Dark-Eyed Juncos because of their gray and brown colorations. But it is impossible to overlook their helpful and voracious weed seed and insect-eating appetite. Come discover more about the number one feeder bird in the US!
Though Pluto is no longer a planet, few know about the deep-space objects that were found which sparked that change.
Gene drive seeks to insert or remove a chosen trait in the genome of an entire species. Future applications include eliminating malaria, the zika virus and other diseases.
Cape Buffalo are known as Black Death and feared and sought after by hunters. Can you tame a Buffalo? Read about my own encounter and learn more about these majectic beasts.
Pyrosomes are strange creatures that swim in the ocean and are bioluminescent. They are undergoing a puzzling population increase off the west coast of North America.
Hickory horned devil caterpillars look huge and ferocious, but are harmless; and being a caterpillar simply puts them closer to becoming beautiful, regal moths, so don't be afraid of them!
The debate is hardly over yet, but the scales-versus-feathers controversy just gets more and more interesting. Which dinosaurs certainly had feathers, and which dinosaurs might have?
How to learn your times tables fast. There are a few tricks to help you with your times tables and even a link to my video "How to Learn Your Times Tables Fast"
How is form related to function? How does primary structure influence tertiary structure? What is the secondary structure of a protein? What is tertiary for that matter? This hub answers these questions and more.
Find the best facts about echinoderms right here! Ten fun facts for whatever your needs! You'll be learning about Echinoderms in no time!
The history of life series moves on to the period where not only complex lifeforms evolved, but came to take over the world. But they didn't have everything their own way, the Paleozoic era bore witness to natural disasters that make our problems seem minute...
Though a thorough list of movies would go on forever, it is possible to look at the Hollywood approach to black holes and learn what they got right—and absolutely wrong.
Learn more about the Drake Equation, a tool used to predict the number of intelligent alien civilizations in our Milky Way Galaxy.
Honey bees are an amazing insect that is gaining support because of their importance in agriculture and producing food. Here are five interesting facts that most people don't know.
As summer approaches and people go hiking in the woods, it becomes necessary to be able to spot harmful plants that can ruin a vacation or day out
Alex explores the possibility that life may exist on Saturn's Moon Titan. He references multiple credible sources to give credence to his thoughts as he explores the potential of our solar system!
Is the tomato a fruit or vegetable? It depends on your school of thought. Explore the topic botanically, horticulturally and from a homeowners perspective.
Few multiple choice questions on mechanical ventilation. Useful for medical, nursing, physiotherapy and respiratory therapy students.
Tadpoles are very different from adult frogs and, after a period of growth, undergo metamorphosis. To change into the adult form, they must develop limbs, lose their tail and gills and remodel their guts and head to change into an amphibian that can live on land.
A photographic odyssey explaining the progression and formation of the ice shelves forming on The Great Lakes before and after the 2014 historic polar vortex event. Includes hidden dangers!
We waited for nearly a decade but New Horizons accomplished its primary mission of rendezvousing with Pluto. What secrets did it uncover?
When asked why the sky is blue, most people are able to come up with a vague statement about some gas called ozone being blue. The real answer, however, is much more interesting.
Like many aspects of particle physics, electrons offer their own unique problems. Here is a sampling of some of the most interesting ones.
The Summer Triangle is the name given to an area of the night sky that contains several features of interest for the amateur astronomer.
What do you know about invasive spiders, scorpions and slugs? Introduced species cause big problems in the UK, so find out how the arrived and the effects they have on native species and ecosystems
We've been watching the dramatic New Horizons flyby of Pluto over the past few weeks, and many people are saying, "Come on, REALLY. That's a PLANET!"
Have you ever wondered why some birds have iridescent patches; or why Northern Cardinals are red; or what makes Blue Jays blue? How dull would life be without the colors that punctuate our lives? Everywhere you look Mother Nature has given us a huge paint box full of colors; and she reserves her most diverse color palette for our backyard birds.
Volcanoes come in many forms, from the steady and slow-moving basalt flows of Hawaii, to towering mountains such as Mount Fuji, to the calderas of super-volcanoes. Below are a couple that are overdue.
Like the chicken or the egg debate, this has two sides that are determined they are right. Here is the evidence we have, and no easy answers are to be found.
Roman numerals have been around for about 3,000 years, and they became a recognized number system that was used around the world.
Need high school geometry homework help? This Math Made Easy! Geometry Tutorial explains how to find the circumference of a circle with easy to follow problems and solutions.
Students usually make unnecessary mistakes in their examinations that cost them precious marks. These are some of the common errors they make in their electricity and magnetism exams.
Nobody knows exactly where this probe is nowadays. NASA lost contact with it in 2003, ending a 30-year mission. But there's a milestone here, it's now the furthest derelict man-made object.