Why do zebras have stripes?

A team of life scientists has found part of the answer: The amount and intensity of striping in different zebra populations can be best predicted by temperature.

Q&A: Biologist Tom Smith on taking evolution into our own hands

UCLA professor Tom Smith says human-driven evolution is creating drug-resistant diseases, pesticide-proof bugs and mass extinctions due to climate change. "We can either choose to manage evolutionary processes or not, but evolutionary change will proceed regardless."
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