
The SciencesMarch 1, 1972
The Cave Bear
This large-headed species lived from the Pyrenees to the Caspian Sea during the Ice Age. One cave alone has yielded the remains of 30,000 such bears. What caused the species to become extinct?

The Cave Bear
This large-headed species lived from the Pyrenees to the Caspian Sea during the Ice Age. One cave alone has yielded the remains of 30,000 such bears. What caused the species to become extinct?

Continental Drift and Evolution
The breakup of ancient supercontinents would have had major effects on the evolution of living organisms. Does it explain the difference in the diversification of reptiles and mammals?