00:00Western Canada, today a majestic landscape of snow-capped peaks, turquoise lakes,
00:28and mighty rivers that erode the ancient bedrock, the perfect conditions for dinosaur hunting.
00:49Here on the banks of Red Deer River, paleontologists from the University of Alberta
00:56are unearthing the final resting place of a super-predator.
01:05Oh, wow. Yeah, that's really nice.
01:08Looks like a toe claw.
01:10Wonderful find.
01:12Albertosaurus, T-Rex's deadly cousin.
01:16These are the remains of a teenager.
01:23The teen calls her Rose.
01:27Holy cow. It keeps going.
01:31Inspired by their discoveries,
01:34we can imagine her story.
01:43In the late Cretaceous, North America is split in two by a vast inland sea.
01:49On its western shores, a sprawling expanse of dense forests and rugged coastlines.
02:04Laramidia, a land in crisis.
02:08Atmospheric changes have forced temperatures down by two degrees.
02:12A seemingly small change, but enough to push the delicate ecosystem out of balance.
02:24Food is scarce.
02:37Even...
02:40For a hour.
02:43Food is scarce.
02:45Food is scarce, even for an apex predator.
03:00Standing two and a half meters tall and weighing in at one tonne, this is Rose, the Albertosaurus.
03:12It's been a week since she last ate.
03:25But in her sights, an Orinoceratops, an older cousin of Triceratops, a chance for Rose to
03:39satisfy her hunger.
03:55Rose might just be the fastest land predator on the planet.
04:02Standing at up to 30 miles an hour.
04:10But Rose has miscalculated.
04:26At two tons, her target is twice her weight, with horns almost a meter long.
04:42Rose is starving.
04:52But the risk of injury is just too great.
04:59Dinner will have to wait.
05:29In the cave, Rose calls home.
05:33She's far from alone.
05:47Albertosaurus are social animals.
05:55They live and hunt together, forming strong, intimate bonds.
06:11Rose has paired with this male Albertosaurus the same age.
06:18A source of comfort in times of scarcity.
06:29It's been over a week since the Albertosaurus last made a kill.
06:37And starvation isn't the only threat hanging over Rose.
06:51Rose is the matriarch.
06:52Wracked with intense hunger, she could turn on her own.
07:09And Rose is bottom of the pecking order.
07:27If she hopes to survive, she'll have to prove herself when it matters most.
07:41It's time to go hunting.
07:52This corner of Canada once played host.
07:59To one of the most remarkable sites in Earth's history.
08:14A migrating Edmontosaurus herd.
08:23Thousands of plant-eating dinosaurs, moving as one.
08:31But an individual adult Edmontosaurus can be three times the weight of even the largest Albertosaurus.
08:46So, working as a pack is the only way to take down such colossal prey.
09:15Higher ground will provide the perfect vantage point to mount an attack.
09:39At this time of year, this area should be teeming with Edmontosaurus.
09:43But the herds are nowhere to be seen.
09:45But the herds are nowhere to be seen.
09:50This is a time of intense geological upheaval.
09:57As the continents move.
09:58This is a time of intense geological upheaval.
10:04As the continents move.
10:11The land buckles and splits.
10:12Lava and ash engulf the landscape.
10:18Lava and ash engulf the landscape.
10:25Forcing this Edmontosaurus herd.
10:26Forcing this Edmontosaurus herd.
10:33To take a much longer route north this year.
10:34To take a much longer route north this year.
11:11They're still many miles away from the starving Albertosaurus.
11:26For the pack, the delay spells disaster.
11:35But on the horizon...
11:38Rose spots an opportunity.
11:51Cryodrakon, a giant pterosaur.
11:55They feed on an enormous ammonite, washed up on the spring tide.
12:09The cryodrakon would make a fine meal for Rose and her mate, if they can catch one.
12:28Approaching from downwind, and with a pterosaur's attention on their meal, the youngsters close in.
13:15At last, a chance to feed.
13:45But the pair's absence from the pack hasn't gone unnoticed.
14:15As pack leader, the matriarch is eyeing up the youngster's kill.
14:40Rose is determined to defend her prize.
14:49But the matriarch leaves her in no doubt who's in charge.
14:55The matriarch leaves her in no doubt.
15:05The matriarch leaves her in no doubt.
15:15Hungry and badly wounded, Rose has learnt a painful lesson.
15:30She'll have to play by the rules if she wants to survive.
15:39Starving, shaken and badly wounded, Rose needs comfort.
15:59The young Albertosaurus take time out together to groom.
16:08A soothing ritual.
16:20That strengthens their bond.
16:29That strengthens their bond.
16:42They've passed away from the old man of the old man who's in the rectum.
16:55They've started this.
16:56This is a little bit of a advantage in the long period of time.
17:00It's as if it doesn't handle the same with the old man.
17:06As a new day dawns, the pack's luck may be about to change.
17:36The Edmontosaurus have finally made it to their summer feeding ground.
17:53Not a moment too soon for the starving Albertosaurus.
18:01And despite their young age, Rose, her mate and the other youngsters will play a crucial role in the hunt.
18:12The fate of the whole pack depends on them.
18:23Rose and her mate split off from the pack.
18:31As the swiftest runners, they must identify a target and separate it from the herd.
18:50But they're a fraction of the weight of the largest Edmontosaurus.
19:05Impulsive and inexperienced, Rose's mate blindly charges into the herd.
19:19They're going to take down one of these enormous creatures alone.
19:23Oh.
19:24Yeah.
19:25No.
19:26Yeah.
19:27That's an incredibly annoying creature.
19:31Oh.
19:32Oh.
19:33Yeah.
19:34Rose has lost her closest companion.
20:04And each failed hunt brings her and the rest of the pack closer to starvation.
20:31Rose may have lost her mate, but she must now work with the other youngsters to find the
20:36easiest target.
20:42But with one failed hunt already, the pressure is on.
20:58Rearing up on their hind legs, the Edmontosaurus are too powerful.
21:23Rose bides her time until she spots an older individual.
21:36One that might be weaker than the others.
22:03Rose can't take this Edmontosaurus down alone, but she can steer her prey right towards the
22:16killing jaws of the Matriarch.
22:23But there's still fight in this old bull.
22:30Rose has played her part to perfection.
22:43Finally, the pack can feed.
22:56And this time, Rose gets her share of the spoilers.
23:15Rose gets her share of the spoilers.
23:40Rose dies.
23:41Rose dies.
23:42Rose dies.
23:43Rose dies.
23:44Rose dies.
23:45Rose dies.
23:46Rose dies.
23:47Rose dies.
23:48Rose dies.
23:53Rose dies.
24:03Rose dies.
24:04And though her death is a mystery, now, at least, we can tell the story of how she may have lived.
24:14Rose, the young Albertosaurus, earned her rightful place, hunting and surviving with her pack by her side.
24:44Rose, the young Albertosaurus.
25:14Rose, the young Albertosaurus.
