Biologists normally look for the hellbender slamander, which is known by the nickname "snot otter," under rocks in streams. But now there's a gentler way: They can take water samples and look for traces of the animals' DNA.
Robert J. Erwin/Science Source
Those are two whales coming up from the water, just feet away from two divers off the coast of central California. The image is from a video, which has gone viral, taken on Saturday.