RACHEL MARTIN, HOST:
Good morning. I'm Rachel Martin. For the past 30 years, a bizarre-looking skull has been sitting inside the Natural History Museum of Denmark. No one knew much about it besides that it came from Greenland and looked like a narwhal - those whales with unicorn tusks. But it had these really bizarre teeth. New DNA testing has now solved the case. The animal's mother was a narwhal, the father a tuskless beluga, making their offspring a narluga. Scientists say it's a bizarre hybrid, but love is strange and wondrous. Transcript provided by NPR, Copyright NPR.