PowerPoint Presentation

11/17/03

The Red Queen Hypothesis

•Observation: a species probability of extinc-tion is independent of time it has existed

•Hypothesis: species continually adapt to each other

•Extinction occurs with insufficient variability for further adaptation

“Now, here, you see, it takes
all the running you can do,
to keep in the same place.”
— Through the Looking-Glass
and What Alice Found There


	(S&G 253-4)