12 Jan
2014
12 Jan
'14
2:49 p.m.
Please omit Marc Abrahams from your distribution lists in posting on this thread. I meant to bcc him and cc'd him instead. Jim Propp On Saturday, January 11, 2014, James Propp wrote:
Has anyone ever proposed in the Annals of Improbable Research or a similar venue that, in addition to undergoing periodic reversals of its magnetic field, Earth is also subject to occasional short-lasting reversals of its gravitational field?
Such a phenomenon would handily explain selective extinction of megafauna: a mouse could survive an upward fall for five seconds followed by a downward fall for five seconds followed by an extreme deceleration, but a mastodon would not fare as well. :-)
Jim Propp