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Sökt på: Böcker av David M. Raup
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totalt 2 träffar
Extinction
häftad,
1993,
Engelska,
ISBN 9780393309270
In the geological record, there are five major mass extinctions—the "Big Five." The most famous happened at the end of the Cretaceous Period, when the dinosaurs and two-thirds of …
The Nemesis Affair
häftad,
2000,
Engelska,
ISBN 9780393319187
Nemesis is the name given by scientists to a (theoretical) small companion star to our sun. Every 26 million years, Nemesis's orbit brings it close enough to the sun to bombard our …