The remarkable discovery has allowed dinosaur experts to piece together a picture of a diminutive but formidable predator that was so finely tuned to killing they describe it as "Jaws on legs".

通过这一不寻常的发现，恐龙专家拼凑出一个身材极小但又很可怕的食肉动物的图像，他们将造物主如此精致打造出来的杀手称为“腿上巨颚”。

youdao

This gives the dinosaur-killing rock only 15 million years to move into a suitable place to be flung out of the main belt and to travel to Earth in time for the impact 65 million years ago.

BBC: Asteroid thought to kill dinosaurs may not be guilty