We're making great strides in developing alternatives, but here's why it's still necessary to test on animals.
Life's Little Mysteries answers fascinating questions about the world around you and the stuff in it, from things in the news and on your mind to crazy questions you didn't even know you had.
You may give them little thought beyond when to trim them or which nail color to apply. But the humble nail laid the groundwork for our evolution into the humans we are today.
The Big Bang is commonly thought of as the start of it all: About 13.8 billion years ago, the observable universe went boom and expanded into being. But what were things like before the Big Bang?
Drogon, Viserion and Rhaegal in HBO's "Game of Thrones" can breathe fire. But can any real animal pull off this fiery defense?
The event horizon is the threshold around the black hole where the escape velocity surpasses the speed of light. Here's what that means.
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