The giant-impact hypothesis posits that billions of years ago a Mars-sized body named Theia collided with the early Earth.

From the daily newsletter: a doctor goes to Mars. Plus: investigating celebrity yearbooks; Merve Emre on friendship books; ...

If you want to explore space with humans, water becomes one of the most critical commodities,” explains Mahesh Anand, a professor of planetary science and exploration at the ...

NASA’s Webb Space Telescope reveals ancient surface of Pluto and other celestial bodies for the first time - Scientists say ...

A doctor explains why 30 minutes walking daily is enough for a whole host of health benefits, including a reduction in ...

Body Mass Index cannot differentiate between muscle mass, fat and bone density. Doctors suggest other markers and scans to ...