llustration by Todd Marshall via Science Meet Raptorex kriegsteini, a new dinosaur species described this week in the journal Science. This "tiny" Tyrannosaurus rex ancestor would still look big to us at nine feet (three meters) tall., but quite small compared to its descendent T. rex. Other than the size difference, the two dinosaurs look remarkably alike, according to Paul Sereno of the University of Chicago and a National Geographic Explorer-in-Residence.
This new dino changes the way scientists think about the evolution of T. rex's short arms. Raptorex kriegsteini also had short arms, meaning that T. rex's short arms evolved later than previously believed, according to Thomas Holtz of the University of Maryland (who is not associated with the study).
Learn more about this find on National Geographic News.
Get the facts on Tyrannosaurus rex on National Geographic Kids.
Search for T. rex bones in Zipper's Cave Maze.









Wow, I guess "tiny" isnt so tiny!
But, i think its awesome they found a new dino to their collection.
So was this dino a new species that was recently discovered or is it just recently written about?
Can someone please answer? Thanks :) in advance.
i guess this is cool
but it's just a new dino...
it'll be cooler if it were i don't
know maybe LIVING!!!!!
I do not believe such creatures lived millions or billions of years ago. Dinosaurs and all other "Prehistoric" animals were created on Day 5 (land-dwelling creatures including humans)and the Day before that was when the marine animals and also the birds(creatures of the air) were made. Nothing ever evolved. God created everything and that also includes the entire universe! The Bible speaks of Creation in the Book of Genesis. However there is much more found within Genesis. It speaks of how earth came to be and how mankind thrived. Are you familiar with the story of Noah's Ark? It is no fantasy! But you may learn more of it than you knew before... I encourage everyone to attempt reading the Book of Genesis and the rest of the Bible, too. You may not believe it at first, but at least try it before rejecting it!
I agree with eshemie3
I still think it is cool though
Evolution never happened
It looks like a bird loosing all it feathers
I agree with emshemie3. One day to god is like a thousand years to us.
Thanks to those that are agreeing with me! I appreciate you guys with your support.