[meteorite-list] What killed off megafauna?

From: Matson, Rob D. <ROBERT.D.MATSON_at_meteoritecentral.com>
Date: Fri, 24 Jun 2016 01:58:17 +0000
Message-ID: <4A4FA25E4DFE584AA580F4F069F9B440B5F506A2_at_EMP-EXMR104.corp.leidos.com>

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 percent "protection". Doubt it's even measurable as far as earth impact rate vs. Moon's. --Rob
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From: Meteorite-list [meteorite-list-bounces at meteoritecentral.com] on behalf of E.P. Grondine via Meteorite-list [meteorite-list at meteoritecentral.com]
Sent: Thursday, June 23, 2016 4:39 PM
To: meteorite-list at meteoritecentral.com
Subject: [meteorite-list] What killed off megafauna?

Hi Paul -

Two of the impact events are now pretty well known:

http://archaeologica.boardbot.com/viewtopic.php?f=9&t=3656
http://archaeologica.boardbot.com/viewtopic.php?f=9&t=3668

Of course, work is just beginning on the sequence of impacts for South America and their
related meltwater pulses.

It is really strange to watch the psychological process of denial going on here.
I wish I had just a small part of the money spent on this denial for more research into what actually occurred.

Or better yet, have your personal salary dependent on actual impact research.
That would certainly focus your own fine skills.

BTW, you can not use impact data from the Moon in a straight line to estimate the
impact hazard for the Earth.

The Earth usually protects the Moon from impactors.

E.P.
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Received on Thu 23 Jun 2016 09:58:17 PM PDT