Can your grandma really tell when a storm is coming based on her knee? Scientists have been looking into this tale for years, and either way, you should probably still call her just because.

We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017

Hosted by: Stefan Chin
----------
Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow
----------
Dooblydoo thanks go to the following Patreon supporters: KSam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth,
سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal, Justin Lentz
----------
Looking for SciShow elsewhere on the internet?
Facebook: http://www.facebook.com/scishow
Twitter: http://www.twitter.com/scishow
Tumblr: http://scishow.tumblr.com
Instagram: http://instagram.com/thescishow
----------
Sources:

http://www.pbs.org/newshour/rundown/patients-blame-weather-aching-joints/
https://www.ncbi.nlm.nih.gov/pubmed/17466654
https://www.ncbi.nlm.nih.gov/pubmed/27492467
https://academic.oup.com/painmedicine/article-abstract/18/6/1139/2694953/Acute-Low-Back-Pain-Do-Not-Blame-the-Weather-A
https://www.ncbi.nlm.nih.gov/pubmed/7659442
http://www.nytimes.com/2013/07/02/science/can-barometric-pressure-cause-headaches-and-other-discomforts.html
https://www.ncbi.nlm.nih.gov/pubmed/9090247