Earth's largest animals, whales, need a lot of food... that goes without saying. But, new research from a team at Stanford University have found that whales need 10-20 tonnes of food on a feeding day, which is up to three times more than initially thought. Of course that means three times more poop... and as whale poop drives nutrient recycling in the oceans, this could have a big impact on marine ecosystems. Katie King found out more from the lead author Matthew Savoca... Like this podcast? Please help us by supporting the Naked Scientists