Fw: Latest News from the Astrobiology Magazine

[LARRY KLAES]

----- Original Message ----- From: Astrobiology Magazine To: [EMAIL PROTECTED] Sent: Wednesday, October 20, 2004 5:34 AM Subject: Latest News from the Astrobiology Magazine Multiple Impacts? http://www.astrobio.net/news/article1253.html The Chicxulub meteorite impact is largely credited with the extinction of 50 percent of the world's species, including the dinosaurs. But could there have been more than one meteorite impact 65 million years ago? Worlds in Collision http://www.astrobio.net/news/article1252.html Planet-building is a violent, messy process. Observations made with the Spitzer Space Telescope indicate this process may last much longer than previously thought. Planet Building: Colliding Mountains http://www.astrobio.net/news/article1251.html How is a planet built? The standard model assumes aggregation of fine stellar dust, but observations using the infrared Spitzer telescope now suggest that mountain-sized aggregates collide to make new worlds. Step Off a Cliff http://www.astrobio.net/news/article1250.html In high-resolution, an ancient martian basin called Huygens shows evidence of sediment filling, erosion and dendritic patterns characteristic of water run-off. Wednesday, October 20 ------------------------ For more astrobiology news, visit http://www.astrobio.net To unsubscribe, send subject UNSUBSCRIBE to [EMAIL PROTECTED]