• Cocaine addicted monkeys placed in larger and nicer cages use less cocaine.
• Cocaine addicted monkeys placed in smaller and less stimulating cages use more cocaine.

Since monkeys are a pretty good indicator of human behavior, maybe we shouldn't put people in small and sterile jail cells after we catch them using cocaine?

Scientists are getting closer to understanding what factors put people at greater risk for things like addiction and other compulsive behaviors - Cambridge University researchers make a breakthrough in understanding cocaine addiction.