Megaladon in science

Today in science we talked about megaladon and about if it is extinked  or still alive a guy has made a replica of his jaw and have got authentic teeth on it and he was diving for years and collections teeth .he was diving with his and a sand shark bit his flipper and it almost came off and another time he almost got hit when he hit him with his screwdriver and it hit his friend and it dislocated his shoulder he finished hi jaw in 25 years. By Brennan