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What really killed the dinosaurs?
"An asteroid 65 million years ago" is no longer enough
 
The mighty T-Rex may now be only the second-biggest land-based dinosaur, after scientists unearthed an apparent bone from a giant new species that roamed the world 90 million years ago.
The mighty T-Rex may now be only the second-biggest land-based dinosaur, after scientists unearthed an apparent bone from a giant new species that roamed the world 90 million years ago.
CC BY: jeffdoe
 

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