A seven-year-old girl fell into a river in Qingyuan City, Guangdong Province, China, on Sept. 11. The river was fast-flowing. Spotting what happened, an innocent bystander immediately took action and ...

Jezero Crater on Mars was once home to a lake, delta and rivers. See an animation of what it could have looked like when water poured into the crater billions of years ago and present day. Credit: ...