Add Yahoo as a preferred source to see more of our stories on Google. Summer vacation is the perfect break from the demands of school and all its math and science. A time to take it easy and soak up ...

Add Yahoo as a preferred source to see more of our stories on Google. Kate Biberdorf, also known as Kate the Chemist, joins TODAY’s Jenna Bush Hager and guest co-host Tiffany Haddish to share fun ...

Before you submit an error, please consult our Video Help page. Physics Girl is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, ...