In reply to Horace Heffner's message of Sun, 6 May 2007 02:41:17 -0800: Hi, [snip] >Further, the hypothesis doesn't give a reason the major >extinctions start about 600 My ago.
I didn't think there was much life around to extinguish prior to 600 MY ago. (Or if there was, then probably mostly bacterial, and we wouldn't notice an extinction event anyway.) Regards, Robin van Spaandonk The shrub is a plant.
