How Did T-Rex Lose Its Arms?

Tyrannosaurus rex was big and ferocious, but it had tiny arms. The story of how T-Rex lost its arms is pretty simple. But what’s complicated is the story of why it kept those little limbs, and how it used them.

THIS IS COOL. I WANT TO LEARN SOMETHING ELSE, TOO!

Video via – PBS Eons
Further Readings And References @ Nature, Biology Letters, and ResearchGate