The height of the world's tallest waterfall is so great that the stream of water atomizes into a cloud of mist, then trickles back together at the bottom of the plunge.
A quicksand pit can be a tricky thing to escape from, but scientists explain why the hazard can't swallow you whole.
Dog owners will swear that their dog can smile, but scientists can't confirm this interpretation. Life's Little Mysteries examines whether animals have feelings.
The oldest tree has been around since before the pyramids. Life's Little Mysteries explains how it got so old.
The most dinosaur fossils and the greatest variety of species have been found in the high deserts and badlands of North America, China and Argentina.
Researchers are finding ways that we might be able to edit certain types of memory, the way we do a home movie.
Memories underlie so much of our rich life as humans -- the ability to learn, to tell stories, even to recognize each other.
Most people learn about bacteria in the context of disease, so it's easy to think about the harm they do. But could we live without them?
This muscular gland weighs about three-fourths of an ounce (20 grams) -- about the size of a small apricot.
It may seem almost like a magic trick: leftover veggies from last night's dinner and yard debris go into a pile, and nutrient rich fertilizer comes out.