05.07.2021 - By CBC
Wild donkeys and horses dig wells in the desert, and create a refuge for plants and animals; Genetically modified grass can suck toxic explosives out of the ground; Animals don't seem to much care if they mate with relatives; Making the most of fish waste: how scientists transformed it into biodegradable plastic; Digging into 75,000 year old mastodon dung to learn about ancient Nova Scotia; Why do some animals have slit shaped pupils?