In a new book, NASA astrobiologist Caleb Scharf says the fate of life on Earth may hinge on leaving our planet behind ...

Prepare to be amazed as we reveal the 25 Scientific Discoveries of the 21st century that Changed The World! From the ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Albert Einstein’s Theory of Relativity was ...

If you've ever wished to grasp the basic significance of Einstein's theory of relativity -- to be able, for instance, to assess the possibility of time travel or visualize the behavior of a black hole ...