A Russian physicist has posited an unsettling theory about why we haven’t contacted extraterrestrials.
A boulder discovered on the Moon in 1971 might have revealed some secrets about Earth’s early days.
Stunning snaps from the golden age of space exploration.
When interviewed in 2016 Buzz Aldrin told the true story of an iconic picture from the Apollo 11 mission.
NASA’s Curiosity rover has discovered something incredible on Mars – but questions about the find remain.