jumping spiders actually had several things in common with birds and mammals. Birds and mammals go through two main phases of sleep, called non-rapid eye movement (NREM) and rapid eye movement (REM).

Since juvenile spiders have translucent exoskeletons, it’s possible to see the movement of these eye structures. A 2022 study investigated this and found that the jumping spiders appear to go ...

monitor and analyse a spider’s movement and behaviour. The aim of the research is to answer the question of why jumping spider anatomy and behaviour evolved the way it did, and secondly, to use this ...