Humans and other vertebrates go through various stages of sleep, including REM (rapid eye movement) sleep characterized by rapid eye movements and muscle twitches. Can a similar sleep state be observed in spiders? Researchers from the Institute of Organismic Biology at the University of Bonn in...
Source: [Phys.org](https://phys.org/news/2026-10-distinct-stages-emerge-spider-rem.html)