The Smaller the Spider the Larger its Brain

Nephila clavipes, a big tropical spider (10-to-00), has plenty of brain space. Image credit: Pamela Belding

New research indicates that the smaller the spider, the larger its brain.  William Eberhard, a biologist at the Smithsonian Tropical Research Institute in Costa Rica, recently studied nine species of spiders in which the largest weighed 400,000 times (10+05) as much as the smallest.  He found that in the tiniest spiders, “…the central nervous systems filled nearly 80 percent of the body cavity, including 25 percent of the legs.”

To learn more, visit The New York Times by clicking here.

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