Radar has revealed evidence of an environmentally significant impact that probably occurred during the last 2.6 million years.
Charles Q. Choi, Contributor
Scientists are training computers to help us stop asteroids from crashing into our planet.
Yuen Yiu, Staff Writer
Explore the stars that surround us in this month's slideshow.
Abigail Malate, Staff Illustrator
The Outer Space Treaty, which turns fifty this year, laid the basic ground rules for the exploration of the final frontier.
Catherine Meyers, Staff Writer
Inside Science is an editorially independent news service of the American Institute of Physics