Baby dinos pumped their muscles inside the egg

JURASSIC life was fast and furious even before dinosaurs made it out of the egg.

http://www.newscientist.com/article/mg21829125.100-baby-dinos-pumped-their-muscles-inside-the-egg.html?cmpid=RSS%7CNSNS%7C2012-GLOBAL%7Cmagcontents