Incredible color-changing! How – and why – the octopus, squid, and cuttlefish change color.
Hundreds of events – films, concerts, panels with engineers, scientists and astronauts – about asteroids and how to protect our planet from asteroid impacts.
The first map shows all the known asteroids within one-third of Earth’s distance from the sun today – Asteroid Day – June 30, 2016. Look below for a second map.
Asteroids in Earth's neighborhood of the solar system today, via Armagh Observatory.
On June 30, 1908, an explosion over Siberia killed reindeer and flattened trees. But no crater was ever found. It may have been a small asteroid.
Fallen trees at Tunguska. This image is from 1927, when Russian scientists were finally able to get to the scene. Photograph from the Soviet Academy of Science 1927 expedition led by Leonid Kulik.