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next century or two "could trigger worldwide extinctions.”
Although man probably would not be harmed directly by the warmer temperatures, McLean says the increase is likely to cause sterility in numerous other species of animals.
He notes that other scientists have pointed to the danger of major climactic changes, melting of the polar ice cap, and coastal flooding if the “greenhouse effect” continues.
Differs Fran Others
McLean's new theory about dinosaur extinction runs counter to most recent thinking on the subject which holds that a general cooling trend ended the reign of the big animals.
But McLean notes that larger animals adapt to cooling conditions better than to warming trends because they tend to conserve their body heat. He adds that smaller reptiles, such as alligators, turtles and snakes survived the “time of great dying."
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