The foul stench of penguin poop sets Antarctic krill on edge. In lab experiments, the mere scent of penguin droppings — or guano — sent krill scrambling for escape, researchers report March 20 ...

Penguin poop is stinky but useful. In Antarctica, the birds’ nutrient-rich guano allows mosses and other organisms to flourish in an otherwise inhospitable place. And, since poop stains on the ice are ...

Poop gets its odor from bacteria ... can disrupt your digestive system and can cause stinky stool and diarrhea — though experts have yet to determine exactly why this happens.