❃ Sorry to burst your bubble, but Giganotosaurus actually means "giant southern lizard" and not the "gigantic lizard" you thought it was. It still gigantic, though.
❃ Talking about gigantic, the Giganotosaurus outweighed the T.rex even as full-grown adults.
❃ Sure, it was bigger than the T.rex, but the Giganotosaurus had a small brain for its gigantic size. It was later approximated to have had a brain the same size as a banana. If you'd prefer the 3D version click here!