Date: August 7, 2015
Source: University of Arizona
Summary: New analyses of vertebrate groups performed by an evolutionary biologist suggest that land animals proliferate more rapidly than their aquatic counterparts. The findings may help explain biodiversity patterns throughout the animal kingdom.Of the nearly 1.5 million known animal species on Earth, those with backbones come in a stunning array of shapes and sizes. Vertebrates include fish, amphibians, reptiles, birds and mammals, and the number of species within these groups can vary wildly. For example, there are only six species of lungfish and only 25 crocodilians -- but roughly 10,000 birds and 9,700 lizards and snakes.
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