How did skates and rays develop their unique wing-like fins? Researchers from the University of Chicago recently revealed the animals altered their body structure to live on the ocean floor, and to do so they relied on repurposed genes.
A recent day on the Internet had the hashtag Flatshark. There are more than 500 rays and skates -- the "flatsharks" in question, all related to sharks. As public opinion turns in favor of sharks, scientists would like to see rays get attention, too.