Certain species might have even stranger sleep states. A study in 2021 looked at European jumping spiders (Evarcha arcuata) and found they rest at night by suspending themselves from a single silk ...

Aside from the strange positioning, though, 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 ...

And just like a spider jumping into your mouth as you sleep, that’s actually surprisingly unlikely: “comprehending a statement requires automatically accepting it as true,” the Duke ...