According to research, scientists know quite a lot about sharks. For example, we know that an estimated 57 shark species are bioluminescent (can produce light). We know that certain sharks, like whale ...

DAVE WADDLES IS THE LEAD BLACK BEAR BIOLOGIST FOR THE MASSACHUSETTS DIVISION OF FISHERIES AND WILDLIFE. HE MONITORS THE STATE’S BEAR POPULATION, WHICH HAS BEEN GROWING FOR THE LAST 40 YEARS. WE NOW ...