Why cancer drugs are being discovered in the ocean

Lots of medicines are found in nature. But why? What do these chemicals do for the organisms we find them in? The answer is often surprising. Like trabectedin, a chemotherapy drug made by a sea squirt. Or eptifibatide, a blood thinner derived from snake venom. Or ziconotide, a pain killer made by a sea snail. Animations by Dom Burgess. His brilliant channel, Every Think, is here: https://www.youtube.com/channel/UCGI000V6ZIAQf97MNybAaLQ His video about going to Mars is here: https://www.youtube.com/watch?v=a6qMaA4G3zU&t=69s The video I made with The Body shop is here: https://www.youtube.com/watch?v=8bHfQeZ-MwI First poppy image credit: afgooey74 on Flickr https://www.flickr.com/photos/24102780@N03/3702843836 Second poppy image credit: Laughlin Elkind on Flickr https://www.flickr.com/photos/wurzle/2167828533 Submersible image credit: OAR/National Undersea Research Program (NURP); Univ. of Hawaii Patreon: https://www.patreon.com/stevemould Twitter: https://twitter.com/moulds Instagram: https://www.instagram.com/stevemouldscience/ Facebook: https://www.facebook.com/stevemouldscience/ Buy nerdy maths things: https://mathsgear.co.uk