With COP21 poised to begin in Paris, a new UN report suggests that weather-related disasters were nearly twice as frequent over the past decade as two decades ago.
Astronauts are spending a year aboard the International Space Station, and researchers are looking at what happens to their bodies at the molecular level.
Mesmerizing reconstructions of long-lost human ancestors - created using fossil discoveries and forensic techniques - from a 2013 book published by Yale Press.
It was the first time astronomers knew just when and where a piece of space debris would reenter Earth's atmosphere. It was last night, over the Indian Ocean.