ID 233338340 © Zeeznsk | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
einstein e mc mc2 relativity 2 theory chalkboard science blackboard energy chalk albert black board equation formula m squared written physics math simplicity relativistic school university learning study scientist clever teach teaching mathematics research emc handwriting class lesson text teacher matter mass law education white concept genius exam calculation intelligent