Solid Nitrogen

Published on Dec 18, 2012

Amazing! Place liquid nitrogen in a vacuum chamber and observe frozen nitrogen “ice.”

This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers –

ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.

How Do Squirrels Find Their Nuts?

This is a fascinating look at how squirrels find their buried caches of food.

Published on Feb 25, 2016

Try Squarespace:
You’d have to be nuts not to love this video!
↓ More info and sources below ↓

Special thanks to Jason Goldman (@jgold85) for help with this episode!

Jacobs, Lucia F., and Emily R. Liman. “Grey squirrels remember the locations of buried nuts.” Animal Behaviour 41.1 (1991): 103-110.

Delgado, Mikel M., et al. “Fox squirrels match food assessment and cache effort to value and scarcity.” PloS one 9.3 (2014): e92892.