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Does the type and amount of light you’re exposed to during the day change how well you sleep at night? Diving into the effects of daylight...
Did you know that not getting enough zzz’s can actually make you hungrier? According to sleep scientist Matt Walker, the relationship between what you eat and...
Melatonin is the hormone that tells our brains and bodies it’s time to sleep. But if you think melatonin supplements will significantly improve your ability to...
Every night when you fall asleep and start dreaming, you’re actually doing very important work! According to sleep scientist Matt Walker, dreams act like a form...
Afternoon naps are refreshing — but could they be messing up our sleep cycles? Sleep scientist Matt Walker reveals the pros and cons of napping, plus...
Visit to get our entire library of TED Talks, transcripts, translations, personalized talk recommendations and more. Have you ever misplaced something you were just holding? Completely...
You know you need to get enough sleep, but the question remains: How much is enough? Sleep scientist Matt Walker tells us the recommended amount for...
One of the best things that you can do to boost your immune system is head to bed, says sleep scientist Matt Walker. It can even...
It’s not just your imagination — you’re more irritable when you’re low on zzzzs. Sleep scientist Matt Walker explains how our nightly slumber affects the emotional...
Caffeine wakes you up, and alcohol makes you nod off, right? It’s not that simple. Sleep scientist Matt Walker takes us into the eye-opening ways that...
