Last Day of the Dinosaurs

00:00:01 [ DINOSAURS ROARING ]

00:01:41 QUETZALCOATLUS IS THE LARGEST FLYING CREATURE OF ALL TIME.

00:03:09 MEANS FINDING RICH SOURCES OF PROTEIN

00:05:16 THE TWO ASTEROIDS SHATTER INTO MILLIONS OF FRAGMENTS.

00:07:08 IS THE EARTH'S LAST HOPE OF DEFENSE.

00:08:48 SHE SIMPLY LAYS EGGS IN GROUPS OF FIVE OR SIX

00:10:36 IS APPROACHING THE END OF THE LINE.

00:12:29 ANYTHING DIRECTLY EXPOSED TO THE BLISTERING HEAT...

00:14:37 THEY CAN WEIGH 4 TONS AND GROW TO 40 FEET IN LENGTH.

00:16:42 FROM THE KIND OF ENEMY THAT IS NOW APPROACHING.

00:18:05 HAVE A CLEAR VIEW OF THE APPROACHING CLOUD.

00:19:58 90 MINUTES AFTER IMPACT

00:21:35 THE INTENSE HEAT OF THE EJECTA CLOUD

00:23:50 THE TEMPERATURES ARE FINALLY DROPPING.

00:25:16 TURN A COMMON WEATHER PHENOMENON INTO A SUPERSTORM.

00:27:17 INSTINCT DRIVES THEM

00:29:33 BUT TWO TRICERATOPS ARE A LITTLE TOO MUCH TO TAKE ON.

00:31:34 SHELTERED FROM THE EJECTA BY SEA MIST

00:33:40 TECTONIC PLATES SHEAR AND TEAR.

00:35:31 HYDROGEN SULFIDE.

00:37:31 Narrator: IN THE PACIFIC NORTHWEST

00:40:34 [ GRUNTING ]

00:42:20 [ DOGS BARKING ]

40:00:45 PER HOUR.