Every Time You Eat This, You're Engaging in a Risky DNA Experiment   
It's perhaps the biggest biological experiment humanity has ever seen, and the effects are complex and unpredictable, with pieces of DNA interact with each other in unexpected and potentially dangerous ways. Be careful: here are some of the side effects.

Plants Can Hear Themselves Being Eaten, and Can Communicate the Threat to Their Neighbors   
It sounds hard to believe, but when you understand the chemical reaction caterpillars and other pests can ignite in plants, you'll see why they can literally be man's best friend.