A dinosaur that walked on its two hind legs, may have started out crawling around on all fours whilst its body was still developing
Source:
https://www.newscientist.com/article/2203628-some-baby-dinosaurs-crawled-before-learning-to-walk-on-two-legs/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home