When well-meaning time-travelers divert the dinosaur-killing asteroid and crash on Cretaceous Earth, the once-peaceful Dinosaur civilizations are spared from extinction and go on instead — to become responsible shepherds of the future themselves, or to make the same mistakes over and over? Only time will tell... — "Boundary" by Ryk E. Spoor & Eric Flint Find CoverMyAssCast on Twitter, Gmail and www.covermyasscast.com. https://media.podiant.co/spoke/covermyass/artwork/38c81a08de0670.jpg