Chapter 21: The History of Life on Earth
Lecture Notes		Question Sets
	LN039--Ch21--History of LIfe on Earth		QS033--Ch21--History of Life on Earth
On-Line Resources and Helpful Tutorials
	Molecular Genealogy - Genetic Science Learning Center - An awesome link between molecular biology and evolution
	Understanding Evolution - evolution.berkeley.edu - A one stop shop for all things evolution!
	LINK TO TEXTBOOK--CHAPTER 21
	A Timeline of Life on Earth - www.johnkyrk.com
	A Brief History of Life - Nova On-Line
	Continental Drift - Life: TSOB
	VIDEOCLIP - Potential For Life on Earth
	Miller-Urey Experiments - Life: TSOB
	VIDEOCLIP - Hydrothermal Vents
	VIDEOCLIP - KT Asteroid