英语听力：恐龙之战之极限生存—6

When you start off coming out of the egg and you’re less than, say, 2 feet long and you are in a world full of predators that are loving to crunch on you, then you need to get big fairly quickly.

The future seems bleak for this dinosaur. With its life on the constant threat, how would it survive?

Tyrannosaurus Rex, a skull 1.5 meters long, up to 60 serrated teeth, able to cover 5 meters in a single stride, this is one of the biggest carnivorous dinosaurs ever to walk the earth.

T-Rex has bone-crushing teeth. They’re huge. They have 2 or 3 or 4 times the strength for the body size of any other meat-eater.

But a T-Rex is born into a world of enemies. And survival for this goliath is never guaranteed.

Herbivores are not dummies. They’ll try to remove the dangerous elements in a preemptive strike.

If you are a baby Tyrannosaur, every mega herbivore in the environment wants to crush you.

Even the triceratops with its tiny brain is aware of the T-Rex’s potential menace, knowing that one day, this tiny T-Rex chick will grow into a menacing monster, easily able to attack and defeat this plant eater. But maybe their worst enemy is bit closer to home.

Probably the greatest danger to a baby T-Rex is another T-Rex, the family from over the hill, because Darwinian calculus tells you, the predator, to eliminate your competition, other predators, whenever you can.