Trenton:
How long have you lived here? <a href=" http://www.swsforestry.ie/fertility-drugs-order-online.pptx ">national take back day for prescription drugs</a> Studying the fossil helped scientists solve one of the big mysteries of this type of dinosaur: how it got its crest. Farke says other closely related dinosaurs also have crests, but the Parasaurolophus crest was unique for its tube-like structure, and the fact that it is more circular, broad and long. Other duck-billed dinosaurs, Farke says, had crests that look like a semi-circle on top, a spike sticking off the top of their heads, or crests that look like a hatchet buried into the head.
    Trenton写于2016/3/27 12:37:47