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Humans

Fast asleep? Your unconscious is still listening

Can you really set a mental alarm clock by hitting your head on the pillow before you go to bed? Turns out that's not so far from the truth

3 people napping outside on the grass

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Don’t lose sleep over the claim that long naps may make you ill

truck

Mind

Smart wristband tracks vital signs to keep truckers moving

sleep deprivation

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A bad night鈥檚 sleep messes with your brain鈥檚 memory connections

A man sleeps in an artificially lit factory

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Herpes infections are worse if contracted at the end of the day

Environment

Baby monkeys smile in their sleep – more so than human babies

Life

Found: brain switches that wake flies up and send them to sleep

Environment

First evidence birds nap in flight without dropping out of sky

A woman sleeping with a shaft of light falling on her

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Too much light weakens bones and changes immune system

Humans

Princess Leia brainwaves may help you learn in your sleep

Circular waves that cycle around the brain may represent individual memories of the day鈥檚 events, helping you to remember the most important

Humans

Want to control your dreams? These tips may boost your chances

Humans

I slept for just 20 minutes at a time for 6 months

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5 sleep disorders you didn’t know existed

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So many reasons why sleep is too important to miss