Symbiosis is so much part of life on Earth that it has shaped the evolution and structure of cells. It’s happening almost everywhere we look, including inside our gut.
Tineola bisselliella can survive on as little as a hairball and some vitamin B.
Olaf Leillinger/Wikimedia Commons
An appreciation for the moths that chomp holes in your clothes. They eat the inedible, occupy the uninhabitable and overcome every evolutionary obstacle in their way.