Bombardier beetle spray-bottle explained at last!
The pulse jet -- biology had it first!
Tiny, fast explosions inside the bombardier beetle make a toxic spray, then heat and shoot it at the target. Here's how! More »
Drought + food = instability?Different lessons from California, Syria, Egypt and China More »
Dogs and their owners: A chemical bondOxytocin, the "birth hormone," works on both sides! More »
Continental connection: North, South America linked much earlier than thoughtAncient river moved crystals from Panama to Colombia, proving early land bridge between Americas More »