Wednesday 9 May 2012
One-Million-Year Cycle? Earth's Major Asteroid or Comet Impacts (Today's Most Popular)
One-Million-Year Cycle? Earth's Major Asteroid or Comet Impacts (Today's Most Popular): The image above shows the nucleus of Halley's Comet --an orbiting iceberg visible from Earth every 75 years. Stephen Hawking believes that one of the major factors in the possible scarcity of intelligent life in our galaxy is the high...
Subscribe to:
Post Comments (Atom)
Google Search Box
Custom Search
No comments:
Post a Comment
Note: only a member of this blog may post a comment.