Penguin poo helps form clouds over Antarctica

Penguin poop may help clouds form in Antarctica, according to a new study.

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An estimated 20 million penguins eat, breed and poo on Earth's chilly southernmost continent. This bird scat (also called guano) is full of the chemical nitrogen, which breaks down into ammonia gas. Ammonia is a colourless gas that smells a bit like old wee. At the same time, tiny organisms called phytoplankton in the ocean around Antarctica produce sulfur gas, wh