This article is a summary of Roy Ratcliffe’s recently released book ‘Life on Earth’ (Past, Present and Future)’. Of all the millions of species of life that have existed on earth over billions of ...

This story is a collaboration between Science Friday and KHN. It was written by Sarah Varney. Credit: Eric Harkleroad, KHN illustration; Getty Images; Unsplash. As life-preserving medical technology ...

Elizabeth Dias is the national religion correspondent for The New York Times, and often writes about faith and politics. For this story, she spoke with scientists, philosophers and spiritual leaders ...

Radioactive metals and even certain gases may be capable of the kinds of reactions needed to spur life, new research suggests. When you purchase through links on our site, we may earn an affiliate ...