Giant flea gave dinosaurs the itch

摘要

It's amazing what you find when you scratch about in old rocks -the oldest and largest flea ever discovered, for instance, which has turned up in Jurassic rocks in China. Warm-blooded animals have been itching to get rid of the pests ever since.At 20.6 millimetres long, the 165-million-year old fossils dwarf the largest living flea -a 12 mm species which plagues the mountain beaver of North America.