There are many theories why dinosaurs became extinct and the most popular one is that they were killed from a chain reaction which was initiated from an asteroid which hit the earth. Other theories say that they died from diseases, allergies or volcanoes.
Two scientists from the Princeton University Press support the disease theory in their new book "What Bugged the Dinosaurs". Authors George and Roberta Poinar which specialized in fossilized dinosaur poop found ticks, nematodes, biting flies and other sorts of nasties, including intestinal parasites, dating back to the Cretaceous period. They extracted microbes that cause leishmania and malaria - evidently new pathogens back then, against which dinosaurs wouldn't have had much resistance.
To read the full story follow this link: http://www.time.com/time/health/article/0,8599,1702501,00.html
Thursday, January 17, 2008
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