♪♪ Gates:
I’M IN BAJA, MEXICO TO SOLVE
A PREHISTORIC MURDER MYSTERY — WHAT DROVE THE MEGALODON SHARK, THE BIGGEST, MOST POWERFUL
PREDATOR OF ALL TIME, TO EXTINCTION? PALEONTOLOGIST
DR. ROBERT BOESSENECKER BELIEVES THE ANSWER MAY LIE
IN THE MEG’S FOSSILIZED TEETH, AND WE JUST FOUND ONE. OH, MY GOD!
Boessenecker: WHOA. LOOK AT THAT!
BEAUTIFUL. ARE YOU KIDDING ME? LOOK AT THE SIZE
OF THIS THING! THAT IS A MASSIVE TOOTH. THAT’S UNBELIEVABLE! SO, THIS IS A FULL
ADULT MEG TOOTH? YEAH, THIS IS FROM
A SHARK THAT WAS ABOUT 50 TO 60 FEET
IN LENGTH. THAT IS HUGE. AND IT’S JUST ONE
OF THE ESTIMATED 276 SUPER-SIZED CHOMPERS THAT LINED THIS SUPER-SHARK’S
11-FOOT MOUTH. SO, WHAT CAN WE LEARN
FROM A TOOTH LIKE THIS? SO, THIS TOOTH IS REALLY BIG,
IT’S TRIANGULAR, IT’S THICK,
IT’S GOT SERRATED CUTTING EDGES. THIS IS AN ANIMAL
THAT HAD TEETH ADAPTED FOR FEEDING
ON QUITE LARGE PREY. AND IN FACT, I BROUGHT
SOMETHING ALONG TO SHOW YOU. WHAT IS THIS? THIS IS
A FOSSIL WHALE RIB WITH MEGALODON
BITE MARKS ON IT. AND ON THIS SIDE, THE MEGALODON BIT
ALL THE WAY THROUGH THE RIB. THAT’S INSANE. FOSSIL EVIDENCE INDICATES THAT THE MEG’S PRIMARY DIET
WAS WHALES. BUT AROUND 3 TO 4 MILLION
YEARS AGO, THE NUMBER AND SIZE OF WHALES
BEGAN TO DECLINE. BECAUSE OF THIS, THE MEG
HAD TO TURN TO SMALLER WHALES AND PERHAPS ANOTHER
MORE PLENTIFUL FOOD SOURCE. THE PROBLEM WAS
THEY WEREN’T THE ONLY ONES WHO HAD A TASTE FOR SEAL. OKAY, SO, IF IT DIDN’T DIE OUT
FROM SOME MASS EXTINCTION EVENT, WHAT KILLED THE MEG? COULD HAVE BEEN OUT-COMPETED
BY A NUMBER OF DIFFERENT SHARKS. AND ONE OF THEM IS STILL ALIVE
RIGHT HERE IN BAJA TODAY. IT’S STILL ALIVE?
YES. SO, SHARK SPECIES
THAT ARE ALIVE TODAY ONCE WENT HEAD-TO-HEAD
WITH MEGALODONS IN THE HUNT FOR SMALLER PREY. IN FACT, ONE OF THE BIGGEST,
STRONGEST, AND FASTEST CAN BE FOUND IN THE WATERS
OFF BAJA CALIFORNIA — THE MAKO SHARK. TO LEARN IF THE MAKO
COULD HAVE GIVEN MEGALODONS A RUN FOR THEIR MONEY, I’M MEETING WITH SHARK BEHAVIOR
ECOLOGIST TRISTAN GUTTRIDGE. JUST PUT THAT
ON THE BUCKET THERE. TRISTAN.
HEY. JOSH. HOW ARE YOU, MAN?
HOW ARE DOING? NICE TO MEET YOU.
NICE TO MEET YOU, TOO. I HEAR YOU’RE THE MAN
TO SEE ABOUT A MAKO? YES.
LET’S GO FIND SOME. LET’S DO IT. WE MOTOR OUT THREE MILES
WITH THE FINEST SELECTION OF SHARK CAVIAR ABOARD, AND IT TURNS OUT SHARKS AREN’T
THE ONLY CREATURES OUT HERE WITH A TASTE
FOR THE FINER THINGS. ♪♪ [ SEAL BARKING ] ♪♪ HOW CAN YOU DENY A SWEET
LITTLE FACE LIKE THAT? ♪♪