bacteria

This clip is about microscopes and its development. It begins a CU of…

This clip is about microscopes and its development. It begins with a CU…

Newsreel on the manufacture of Polaroid cameras and film. This section…

Cow grazing in field, cow in laboratory with rubber stopper in its side…

french scientist Louis Pasteur experimenting on animals to prove his…

Discussion of how germs and viruses are spread by sneezing and by hands…