Robert Koch and his team of scientists identified the germs that cause diphtheria, typhoid, pneumonia, gonorrhea, meningitis, whooping cough, tetanus, plague, leprosy, syphilis, and more—that's some important work! Over a period of 100...

While Robert Hooke discovered the cell in 1665, the first cell theory didn't come about until the 1830s. The video explains the discovery of the cell and the scientists involved. It continues to the parts of cell theory and the...

The featured movie focuses on the ancestry of our four-footed friends. Find the fundamental pattern of their limbs and vertebrae in fossils of fish. After viewing, biology learners can enjoy interactive websites to zoom in on the...

Where would we be without bacteria? As it turns out, we owe them everything! Introduce young biologists to endosymbiotic theory using an amazing video from an extensive biology playlist. Scholars discover the bacteria that may be...

Being able to absorb the abilities of other life forms may seem like something taken from a superhero movie, but sometimes reality is stranger than fiction. Join the narrator as he takes viewers back billions of...

How did life on earth begin? Is there a scientific explanation that could show how life arose from chemical reactions? Discover the answers to these questions and more as you watch a basic explanation of the hypotheses currently being...

If life on Earth began as a prokaryote, how did eukaryotic cells arise? Learners explore the history of endosymbiosis from Dr. Lynn Margulis' first writings, which were not widely received to the evidence of mitochondrial DNA. They then...

Journey into the world of the unseen! Learners discover how even the simplest of objects moving at a distance without physical interaction or direction was a problem that mystified scientists for hundreds of years. The narrator explains...

Discusses the history of cell theory beginning in the 1600s. [11:14]

This lesson traces the historical development of the cell theory and explains the importance of the cell theory. Questions for students are embedded in video and presented separately. [4:38]

It's all about the SUPER TINY in this episode of Crash Course: History of Science. In it, Hank Green talks about germ theory, John Snow (the other one), pasteurization, and why following our senses isn't always the worst idea. [12:11]

This video explains the timeline of the history of life on earth beginning with one-celled organisms to the present. She discusses the mass extinctions up through today in the 6th mass extinction which is being caused by humans.