The Wild Reasons Many Older People Wake Up So Early

You might think your grandma who wakes up at 4am just needs less sleep than younger people. Not so! Studies suggest there are some bizarre reasons older people rise at the crack of dawn, including something called brain sand!

Hosted by: Hank Green

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Sources:
https://www.nia.nih.gov/health/good-nights-sleep
https://academic.oup.com/sleep/article/18/6/425/2749669
https://medlineplus.gov/ency/article/004018.htm
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3377480/
https://www.sciencealert.com/your-body-has-trillions-of-clocks-in-its-cells
https://kids.frontiersin.org/article/10.3389/frym.2019.00005
https://www.quantamagazine.org/how-the-bodys-trillions-of-clocks-keep-time-20150915
https://www.livescience.com/13666-older-people-sleep-wake-early.html
https://www.nature.com/articles/497S2a.pdf?origin=ppub
https://www.sciencealert.com/your-body-has-trillions-of-clocks-in-its-cells
https://www.livescience.com/13666-older-people-sleep-wake-early.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5810920/
https://www.huffpost.com/entry/elderly-sleep-less-neurons_n_5692504
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6017004/
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3084079/
https://www.jbsr.be/articles/10.5334/jbr-btr.892/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3142094/