TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of ...

A new model upends the decades-old “hard steps” theory that intelligent life was an incredibly improbable event and suggests that maybe it wasn't all that hard or improbable. The team of researchers ...

Moments in human history are etched into the Earth. Now researchers are piecing together evidence of our impact on the planet – through the marks we've left on nature. The microbes living in ...