Free Science Videos and Lectures

Human neutrophils are mobile cells that will quickly migrate to sites of injury to help fight infection. They are attracted there by chemical signals released by other cells of the immune system or...

This science video contains:
experiment, human, polarization, cell, bacteria, blood, neutrohpil chemataxis, microbes, chemical signal, micropipette

The best physics lecturer Walter Lewin makes another wonderful physics demonstration after having read a lecture on batteries.

The battery he creates has a huge potential difference - 10 to 20...

This science video contains:
experiment, current, walter lewin, physics, demonstration, battery, emf, polarization, hydrogen, potential, sparks