The incredible shrinking Cambrian

Hecht, J.
May 1992
New Scientist;5/2/92, Vol. 134 Issue 1819, p15
Reveals research from scientists at the Australian National University in Canberra who claim the Cambrian was only 20 to 30 million years long. Was thought to be 80 to 90 million years long; Dominated by small animals with shells and ended with trilobites and other larger animals; Description of the study.


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