Countless people — myself very much included — can't get through the day without regular intake of coffee, soda, and other caffeinated drinks. Now it turns out bees love the stuff too... and it's actually good for them.
We know the history of medicine stretches deep into prehistory, but its exact origins remain mysterious. Simple surgery dates back to the stone age, and now there's evidence of basic medical knowledge that dates back to the dawn of humanity.
If you want to see an evolutionary dead end, look no further than the supermarket produce aisle. Every banana you eat is an infertile clone, and its wild ancestors weren't much better when it came to finding new genes.