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RE: new aspect of extinction
Betty Cunningham wrote...
> This ties in with the reasoning I posted many years ago that the land
> animals with functional pineal glands survived the K-T extinction, and
> that the animals with no ability to measure seasons other than through
> temperature changes, did not survive. The pineal gland is a light
> receptor that measures photoperiod in many animals.
Isn't that bass ackward? His idea was that light SENSITIVE organisms
were badly affected. You seem to be suggesting the exact opposite,
that animals with light sensitive pineal glands actually had an edge.