He defied the laws of physics

People's cooperation

A 300-kilogram giant freshwater stingray found on the banks of the Mekong River in Cambodia is possibly the world's largest freshwater stingray.

Benjamin Franklin left $2,000 to Boston and Philadelphia to help young people in those cities. He stipulated in his will that cities could not draw the balance for 200 years. In 1990, it was worth $6.

Scientists launched rockets into the Arctic sky and released glowing clouds to map invisible winds in the aurora