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Spiders Sleep, But Do They Dream?

8.11.2026
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When a jumping spider twitches in its sleep, is it chasing something in a dream?

A scientist watching a jumping spider dangle upside down in a plastic box sparked the question driving this 3 November 2026 piece from Defector. Biologists have long known that mammals experience rapid eye movement sleep. But the idea that an arachnid the size of a Cheerio might be doing the exact same thing forces a sudden shift in perspective. Watching a creature most people instinctively swat away settle down for the night raises a strange possibility: the capacity to dream might be far older than science previously assumed.

An overview of a recent study proving that jumping spiders experience true sleep, including a rapid eye movement stage. Researchers used infrared cameras, sound cues, and sleep deprivation to show that the arachnids have distinct stages of rest and need extra sleep after disturbances. The results suggest that complex sleep patterns extend far beyond mammals and birds.

Read at source: Defector

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