[meteorite-list] Spurious extinction "periodicity"

From: Matson, Rob D. <ROBERT.D.MATSON_at_meteoritecentral.com>
Date: Thu, 8 Feb 2018 19:25:45 +0000
Message-ID: <4A4FA25E4DFE584AA580F4F069F9B440E183CCE7_at_EMP-EXMR104.corp.leidos.com>

It was my understanding that the 26- or 27-million-year periodicity idea was
discredited some time ago as not being statistically significant. In any case,
no ?Nemesis? red- or brown-dwarf companion star (presumably in a highly
elliptical orbit) has ever been found, and if one existed within even 10 lightyears
of the sun, WISE would have found it. --Rob
Received on Thu 08 Feb 2018 02:25:45 PM PST