Elon Musk says his obsession with the red planet is cooling.

They say travel broadens your mind but, if you’re travelling into space, it could displace your brain. Results of new study add to a growing body of evidence that astronauts’ brains change position ...

Deep space travel has a biology problem. Human bodies are built for a narrow band of temperatures, gravity and radiation, yet any realistic journey to Mars or beyond would subject astronauts to months ...