Bok
11-13-2012, 04:12 PM
Hind wings helped a small dino make tight turns in midair
More... (http://www.sciencenews.org/view/generic/id/346409/title/FOR_KIDS_Four-winged_dinosaur)
More... (http://www.sciencenews.org/view/generic/id/346409/title/FOR_KIDS_Four-winged_dinosaur)