The study, conducted by researchers at *The University of Manchester, is the most advanced of its kind to date and first to use 3D CT scanning and high-speed, high-resolution cameras to record, ...

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 ...