But did you know some amazing creatures can actually sleep with their eyes open? It might seem strange, but these animals have developed abilities to rest while staying alert to their surroundings.

Fish sleep with their eyes open since they lack eyelids! That’s why it's essential to turn off your aquarium lights at night, giving your scaly friends the rest they need. Most sharks rely on ...

"Sleep deprivation can be associated with insulin resistance or affecting blood sugar and affecting your cardiovascular ...

I sucked at napping until I tried Ostrichpillow’s blackout sleep mask, which is designed to keep you in total darkness—even with your eyes wide open. Freelance Contributor Freelance ...

This is the time, for many of us, that our last dream dissolves, we open our eyes, and we rejoin our real life. Or do we? Perhaps the most remarkable thing about REM sleep is that it proves the ...

By 11pm, do you find yourself barely able to keep your eyes open or are you able to squeeze in one more episode of Happy Valley before you put your head down? While five hours sleep is the very ...

npj Biological Timing and Sleep is an open access journal: authors pay an article processing charge (APC) for their final published article to be open access online and freely accessible online.