Comments on: Andrew Knoll: ‘Mass extinction is accurate description of how world is changing now’ http://earthsky.org/biodiversity/andrew-knoll-%e2%80%98today%e2%80%99s-extinctions-are-geologically-significant%e2%80%99 A Clear Voice for Science Fri, 10 Feb 2012 06:27:54 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: a p garcia http://earthsky.org/biodiversity/andrew-knoll-%e2%80%98today%e2%80%99s-extinctions-are-geologically-significant%e2%80%99/comment-page-1#comment-14673 a p garcia Sat, 12 Dec 2009 08:38:27 +0000 http://earthsky.org/?p=25085#comment-14673 I haven\'t heard of a mass estension in modern times execpt when Hitler tried to wipe out the Jewish population! I haven\’t heard of a mass estension in modern times execpt when Hitler tried to wipe out the Jewish population!

]]> By: Benjamin Napier http://earthsky.org/biodiversity/andrew-knoll-%e2%80%98today%e2%80%99s-extinctions-are-geologically-significant%e2%80%99/comment-page-1#comment-13451 Benjamin Napier Sat, 03 Oct 2009 18:20:13 +0000 http://earthsky.org/?p=25085#comment-13451 I must take exception to the "fact" that speices loss today is in any way akin to the mass extictions of the past. Not true. Mass extictions of the past were catastrophic events that were not chronic, but sudden. 99% or more of all species that have ever lived on earth are extinct. And man had nothing to do with it. And has little to do with anything happening on a large scale now. I must take exception to the “fact” that speices loss today is in any way akin to the mass extictions of the past. Not true. Mass extictions of the past were catastrophic events that were not chronic, but sudden. 99% or more of all species that have ever lived on earth are extinct. And man had nothing to do with it. And has little to do with anything happening on a large scale now.

]]> By: Steven Earl Salmony http://earthsky.org/biodiversity/andrew-knoll-%e2%80%98today%e2%80%99s-extinctions-are-geologically-significant%e2%80%99/comment-page-1#comment-13412 Steven Earl Salmony Thu, 01 Oct 2009 05:48:56 +0000 http://earthsky.org/?p=25085#comment-13412 How do we move forward from behavior based upon political feasibility and economic expediency to actions driven by practical requirements of biophysical reality? At least to me, it appears that the "window of opportunity" in which restoration of balance between unsustainable, distinctly human overconsumption/overproduction/overpopulation activities on one side and Earth's finite resources and frangible ecology on the other is rapidly approaching its closing time. Perhaps necessary change is in the offing and comes soon enough. How do we move forward from behavior based upon political feasibility and economic expediency to actions driven by practical requirements of biophysical reality? At least to me, it appears that the “window of opportunity” in which restoration of balance between unsustainable, distinctly human overconsumption/overproduction/overpopulation activities on one side and Earth’s finite resources and frangible ecology on the other is rapidly approaching its closing time.

Perhaps necessary change is in the offing and comes soon enough.

]]> By: a p garcia http://earthsky.org/biodiversity/andrew-knoll-%e2%80%98today%e2%80%99s-extinctions-are-geologically-significant%e2%80%99/comment-page-1#comment-13300 a p garcia Sun, 27 Sep 2009 18:26:10 +0000 http://earthsky.org/?p=25085#comment-13300 It is a biological fact that there is a mutation rate. Most are harmless like eye color, but there is a small % of a mutation causing harm like sicle cell amenia. The Earth is constantly changing like seasons of the year. Species that refuse to change will go extinct. Species that do change thieve like the Mountain Lion or the Polar bear. The Mountain Lion has one of the largest habitat next to Man. It is a biological fact that there is a mutation rate. Most are harmless like eye color, but there is a small % of a mutation causing harm like sicle cell amenia. The Earth is constantly changing like seasons of the year. Species that refuse to change will go extinct. Species that do change thieve like the Mountain Lion or the Polar bear. The Mountain Lion has one of the largest habitat next to Man.

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