Amplify Week 4

This week we completed Amplify Natural Selection Chapter 3, if you want to learn more about natural selection or review what we've learned so far, watch Crash Course Natural Selection, the video to the right
GOLD TAPE QUESTION: Watch the video to the right and email or message the answer to  the following question: What trait of humans is an example of "Stabilizing Selection"?

BIG RED CHALLENGE: ​