Why Do We Need Sleep?

Jessi stayed up too late, so she's feeling really tired. Luckily, she isn't too tired to tell you all about what happens when we sleep and why we feel so terrible when we don't get enough sleep! ---------- Love SciShow Kids and want to help support it? Become a patron on Patreon:   / scishowkids   ---------- Looking for SciShow elsewhere on the internet? Facebook:   / scishow   Twitter:   / scishow   Tumblr:   / scishow   Instagram:   / thescishow   SOURCES: http://kidshealth.org/en/kids/sleep.html www.sleepforkids.org https://sleepfoundation.org/excessive... https://sleep.org/