We want to hear from you. Without Resilin fleas couldn't jump worth a hoot. They would have to try to get on dogs by standing on their hind legs and hitchhiking. Probably wouldn't work too well. Randy Johnson can throw a baseball a hundred miles an hour.
Fleas can jump several times a second.
Well it is, as they say, all relative. That must mean he could jump at least that fast. Well it ain't fast enough. If the Greeks and Romans had several thousand Randy Johnsons throwing rocks and spears for them, they might not have been in such a hurry to develop catapults. Not many people can even come close to throwing as hard as Randy Johnson, but a simple hand held shield could stop one of his fastballs pretty easily.