What Are The Chances Of A Planetary Collision?

Writing in the journal Nature this week, scientists present scenarios in which Mercury, Venus or Mars could collide with the Earth during the next 5 billion years. Astrophysicist Greg Laughlin discusses these possibilities and why there's no need to panic yet.



Please keep your community civil. All comments must follow the NPR.org Community rules and terms of use, and will be moderated prior to posting. NPR reserves the right to use the comments we receive, in whole or in part, and to use the commenter's name and location, in any medium. See also the Terms of Use, Privacy Policy and Community FAQ.