Humans have long imagined life on Mars, but what if the red planet actually delivered life to Earth in the first place?

All species on Earth, both living and extinct, are related. We know this because of a biological tool called the tree of life. This "tree" takes the form of a diagram that maps the relationships ...

The building blocks of life on Earth may have been fueled by tiny sparks hopping between water droplets. Four billion years ago, Earth was a lifeless world, but a dynamic one. Crashing waves, rushing ...

In collaboration with researchers from Toho University in Japan, NASA researchers have used supercomputers to model and determine how long life will remain possible on Earth. The calculated end date ...