Nikolai Vavilov in prison

The Weed Scientist Who Brought Down the Wrath of Stalin

Nikolai Ivanovich Vavilov's hypothesis on the evolution of rye is now accepted. But in the 1930s, his research got him arrested.
Poison Ivy leaves

How Poison Ivy Works

Where poison ivy comes from, why it gives some people such terrible reactions, and why—unfortunately for hikers and gardeners—its future is bright.
Alfalfa hops

Cover Crops Are Making a Comeback

Farmers looking increase yields and maintain healthy soil are trying the old technique of planting cover crops again.