This Week: Ancient water = ancient habitat?
In the News: When dead men speak…
Coming Thursday: Roaches: A lot smarter than you thought!
Horseradish, onions and caffeine all activate a group of chemical receptors that can trigger a pain signal. Turns out the same receptors exist in fruitflies, mussels, corals and mule deer. Why has this receptor survived a half-billion years? Because it protects against toxic chemicals – even if they taste good in small doses!