Wander through your backyard or walk along a stream and it’s likely you’ll see a snail – small, squishy animals with shells on their backs. Snails are found in water, whether in salty oceans, rivers ...

The proteins that make mucus appear to have evolved in at least 15 independent instances in mammals, possibly by co-opting existing proteins into mucus-producers. From the gooey saliva of a dog to the ...

This article was originally featured on The Conversation. Wander through your backyard or walk along a stream and it’s likely you’ll see a snail – small, squishy animals with shells on their backs.