A study by NASA using their Wide-field Infrared Survey Explorer (WISE) has led to a new assessment in the number of asteroids that are potentially hazardous to Earth. The results also revealed new information about their origins, and how many asteroids are around Earth. The PHAs (potentially hazardous asteroids, are a part of a larger group [...]
NASA Report: 4,700 Asteroids Currently Threaten Earth is a post from: The Inquisitr