Anyone who steps onto Mars will be crossing a one-way threshold in more ways than one. The physics of getting there and back, the biology of living in low gravity, and the psychology of leaving Earth ...

"The Giant Leap," by astrobiologist Caleb Scharf, is an optimistic account of our widening journey into the cosmos.

Humanity has spent a century turning interstellar travel into a cultural inevitability, from pulp magazines to prestige ...

Ashlee Buzzard has pleaded not guilty to the October murder of her daughter, Melodee Buzzard, in Utah.

Tantalising signs of past microbial life showed up on Mars this year, but to truly know whether they contain the answer to ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.