T-Rex prey grew 'like crazy' to avoid being dino dinner

news.yahoo.com — If you look at a cross section of the bone of a nestling or even from within the egg, there are huge spaces in which blood supply was going through the bone, which means they were growing like crazy,..Hypacrosaurus lived between 67 million and 80 million years ago, was as big as the T-Rex at 30 feet (9.14 metres) tall, but lacked horns or armour