Spiders Pay Back Lost Dream-Sleep

A jumping spider deprived of a REM-like state spent nearly 80 percent more time in it the next night. The University of Bonn says that is a first for an invertebrate.

Spiders Pay Back Lost Dream-Sleep

A jumping spider deprived of a REM-like state spent nearly 80 percent more time in it the next night. The University of Bonn says that is a first for an invertebrate.

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Written companion: the digest.