Re: [meteorite-list] What killed off megafauna?

2016-06-23 Thread Matson, Rob D. via Meteorite-list
Earth provides no real protection for the Moon from asteroid/meteoroid impact. I think the earth subtends something like one 15,000th of the celestial sphere from Luna's perspective. Yes, there is a gravitational factor that improves that a bit, but you're still talking a tiny fraction of a

[meteorite-list] Tridymite Discovered On Mars

2016-06-23 Thread Paul via Meteorite-list
NASA scientists discover unexpected mineral on Mars NASA/Jet Propulsion Laboratory, June 22, 2016 https://www.sciencedaily.com/releases/2016/06/160622170422.htm http://phys.org/news/2016-06-curiosity-rover-evidence-ancient-explosive.html Richard V. Morris, David T. Vaniman, David F. Blake, Ralf

[meteorite-list] What killed off megafauna?

2016-06-23 Thread E.P. Grondine via Meteorite-list
Hi Paul - Two of the impact events are now pretty well known: http://archaeologica.boardbot.com/viewtopic.php?f=9=3656 http://archaeologica.boardbot.com/viewtopic.php?f=9=3668 Of course, work is just beginning on the sequence of impacts for South America and their related meltwater pulses.

[meteorite-list] Meteorite Picture of the Day

2016-06-23 Thread Paul Swartz via Meteorite-list
Today's Meteorite Picture of the Day: Sariçiçek TS Contributed by: Anne Black http://www.tucsonmeteorites.com/mpodmain.asp?DD=06/23/2016 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at