Ever wonder why the sound of fingernails on a chalkboard makes your skin crawl? And why it’s probably crawling right now just thinking about it? Is it an evolutionary trait? A warning system left over from our ancient ancestors? Find out in this episode of SciShow.
About The Author
March 26, 2016
3D printing ACS AI Amazon Android apple Apps Asia Autism bangladesh Bitcoin Brain cancer cats China cyber crime cyber security diabetes DNA drones Facebook Go Google hackers hacking health IBM IPhone Japan Korea Microsoft NASA Norway oculus Robotics robots SIRI solar power stem cells Surgery sweden video VR WIRED Yahoo