Smallest dinosaur of all time

亿年琥珀中现最小恐龙

hummingbird 蜂鸟

skull颅骨

amber琥珀

Mesozoic中生代

excavate挖掘

Myanmar缅甸

zircon锆石（告四声）

radioisotope放射性同位素

A hummingbird-sized dinosaur identified from a skull trapped in amber may be the smallest dinosaur from the Mesozoic Era ever found, according to a paper newly published in renowned scientific journal Nature. 

Scientists investigated the tiny, exceptionally well-preserved birdlike skull found in amber excavated from northern Myanmar's Hukawng Valley in 2016. 

Radioisotope dating of zircon crystals in the amber from this site suggests it was roughly 99 million years old. 

The skull is only 7.1 millimeters long, indicating the dinosaur was similar in size to the bee hummingbird – the smallest living bird.

新闻来源：ChinaDaily