. >> i'm going to introduce you to corinne kennedy who is a fantastic scientist studying mammals. i'm here at the north carolina museum of natural sciences in the extreme mammal exhibit. about a month left. if you haven't been here, we encourage you to check it out before it is gone. behind me is one of the first giant mammals sort of like a kennedy is here this evening to provide a electric -- a lecture on the hippopotamus. i no you did a lot of research. one of the things you are here to dispel is the myth that hippopotamus killed more people than any other animal. >> a much bigger problem with hippos is crop raiding. they do come in and eat the rice and maize. >> we have a picture of one with its mouth wide open. and i don't know, they're very scary. when i was four years old, i was at a zoo. i don't remember which zoo it was and they were standing there. and all of a sudden, one opened its mouth like that. i will never forget it. i ran screaming at 4 years old. you can see why they seem intimidating. are they endangered in any way? >> they are. so hippos are vulnerable so peop