The retroreflectors left as part of the Apollo Lunar Ranging Experiment are still fully functional, though their reflective efficiency has diminished over the years.
While 'Jeopardy!' fans are at home wishing the commercial break was over so they can get back to the trivia action, the contestants are preparing for the next stage of the game.
You might be surprised to learn that a few bent blades of grass are about the only damage that occurs when Marine One takes off and lands at the White House. But your ego could get bruised if you don't hold onto your hat—or any other garment that could go
The short answer is: yes, elements have been removed from the periodic table. The longer answer is that what constitutes an 'element' can be complicated.
Birds take care of their bodily functions a little differently than we humans do—and sometimes seem to use them as a weapon for attacking enemies.
At a time when a new hatchback has exponentially more computing power than the Space Shuttle, pneumatic tires filled with air seem little more than an anachronism. But there's a reason they're still the standard.
For years, media outlets have claimed that the Amazon rainforest is responsible for producing 20 percent of the world's oxygen. But is it true?
When choosing a name, it was important that it be uncommon but easy to remember and simple to pronounce.
Alberta is the only province in Canada that does not have any rats and is, in fact, the largest inhabited area on the planet that is rat-free.
Ostriches and emus share many similar physical characteristics, but there are also distinct differences between the two flightless birds. Which makes them sort of like cousins.
Have you ever smelled a rising loaf of bread or, better yet, smelled the air underneath dough that has been covered while rising? It smells really boozy.
If you have ever visited a museum, you've probably noticed that many ancient sculptures are missing their noses, arms, heads, and other appendages.
Where did people get the idea that Jesus had a middle name? Well, Mark Twain has a funny story about that.
Seaplanes and floatplanes can both be amphibious, but there are certain steps pilots must take to make sure their landing doesn't include sinking or swimming.
For animals, the 18th-century naturalist Carl von Linné introduced the system of binominal nomenclature, where animals have names composed of two parts.
The two terms seem interchangeable, but historically, there was a clear difference between a lawyer and a practicing attorney.
A virus straddles the fuzzy boundary between living and dead, which is why biologists and doctors talk about "inactivated" viruses, not "dead" viruses.
The ISS doesn't have a full-fledged kitchen like we picture here on Earth, but there are sections designated for the astronauts to prepare food and eat.
Allergies are a type of immune dysregulation, like various inflammatory disorders or autoimmune diseases, but a variety of genetic and environmental factors can cause them.
We've all heard the old saying that the only thing that would survive a nuclear winter would be cockroaches (and maybe some Twinkies). So then why are they susceptible to bug sprays?
Why aren't elephants and giraffes the size of brontosauruses and other dinosaurs that we know were enormous?
The ocean basins are constantly opening and closing, so what caused Pangea to break apart is slowly putting the next supercontinent together.
There are a number of theories, but this one focuses on our human need for music as being a side effect of our evolution of self-awareness and love.
Incorporated. Limited. Company. Limited Liability Company. Essentially, the difference comes down to who is in charge and who assumes responsibility for any liabilities.