Khan Academy: Biology: Taxonomy and the Tree of Life

Mr. Khan explains with pictures and diagrams Carl Linneaus' taxonomy system and the biological tree of life. He mentions that the debate still continues regarding how to classify organisms and that newer technology that examines DNA is...

Dicover the science of taxonomy and where humans fit into the tree of life. [12:41]

The science of taxonomy and where humans fit into the tree of life. [12:40]

This video explores the science of taxonomy and where humans fit into the tree of life. [12:41]

For thousands of years people have observed comets as they pass through the solar system, but could there be more to these celestial bodies than meets the eye? Watch this video to learn how these objects have recently been found to...

The Tree of Life is a multi-authored, Internet distributed project containing information about phylogeny and biodiversity. The Tree of Life can be used to locate information about a particular group of organisms through their taxonomy.

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...

This video will explore the pH scale. See some examples of how to calculate the pH of water, orange juice, and bleach. [11:37]

Guess where the oldest rocks on Earth are found? And what do these rocks reveal about the age of the earth?   Viewers of this short video analyze the age of the earth and explore the origin of life through geologic,...

Aristotle explained the idea of spontaneous generation, a concept which lasted almost 2,000 years before scientists proved it wrong. Scholars learn about the history of our understanding of the origins of life. They read examples of...