Public workers clean a subway platform after heavy snow falls during the night in Frankfurt, Germany ...

From breakthroughs in Alzheimer’s prevention and cancer detection to an inspiring story about a single man who changed the lives of dozens of homeless people, this video highlights the most uplifting ...

Luna 9's location has remained a mystery since its 1966 touchdown. Scientists may be closing in on the long-missing landing site of the Soviet Union's Luna 9, the first human-made object to safely ...