One person tells the other not to worry because T. rex
can't see things that don't move.
Now, a scientist reports that T. rex
had some of the best vision in animal history.
Biologist Gregory Erickson of Florida State University studied growth rings inside T. rex
, one of the most fearsome meat eaters ever to stroll the planet, weighed more than 5,000 kilograms as an adult.
The T. rex
slams the duckbill to a cinnamon tree, using its short, two-clawed forelimbs (arms), and chomps the duckbill's back.
Now, a fossil Triceratops skull with healed bone scars may compel paleontologists to give T. rex
"A T. rex
bite has the weight of a pickup truck behind each tooth" says Gregory Erickson, zoologist (animal scientist) at Brown University in Rhode Island.
Ecosystems like the savannas of Africa could have provided sufficient carrion to nourish a scavenging T. rex
, the researchers report in an upcoming issue of Proceedings of the Royal Society of London B.
Some of the teeth were still attached to Giganotosaurus's skull, which measures 1.5 meters (5 feet) and resembles T. rex
There is another mechanism besides muscle that gives energy to running and hopping animals ("No Olympian: Analysis hints T. rex
ran slowly, if at all," SN: 3/2/02, p.
Scientists figure that for a 6,000-kilogram adult T. rex
to dash along in high gear, as much as 86 percent of its body mass would need to be leg muscles--an unlikely pair of drumsticks, indeed.
Recent discoveries in Argentina have dethroned T. rex
and raised up a new contender for the title of King Carnivore.