Big History: The Big Bang, Life on Earth, and the Rise of Humanity

Lecture 17: Life on Earth—Multi-celled Organisms

Alvarez, T. Rex and the Crater of Doom.

Gould, The Book of Life.

Lovelock, Gaia.

1. Why did multi-celled organisms evolve so late in the history of
   life on Earth?


2. How great a role was played by chance in the evolution of the life forms
   that exist today?

Supplementary Reading

Questions to Consider