Blue-ringed octopuses carry a killer concoction called tetrodotoxin (TTX), a potent neurotoxin that can paralyze living things, including humans. Tetrodotoxin is most famously known from pufferfish — ...

Maintaining a stable body temperature is essential for survival. Animals, including humans, use both autonomic processes -- such as shivering or activating brown fat -- and behaviors -- such as ...