Baby dinosaur 化石s 設立する in 'Dragon's Tomb'
A handful of baby dinosaur 化石s 完全にする with fragments of eggshells have been 暴露するd in Mongolia, 研究員s said Wednesday.
They are the youngest ever discovered of a type of 巨大（な） hadrosaur that lived about 70 million years ago, known as Saurolophus angustirostris, which means "lizard crest," said the 熟考する／考慮する in PLOS ONE.
Their 発見 追加するs to knowledge about how dinosaurs developed and grew, from birth to adulthood.
This image 儀礼 of Leonard Dewaele from Ghent University and the 王室の ベルギー 学校／設ける of Natural Sciences and 同僚s, shows perinatal 見本／標本s of Saurolophus angustirostris
The babies all likely （機の）カム from the same nest in a 場所／位置 known as the "Dragon's Tomb" in the Gobi 砂漠, によれば lead 研究員 Leonard Dewaele from Ghent University and the 王室の ベルギー 学校／設ける of Natural Sciences.
The saurolophus family is already 井戸／弁護士席 known to paleontologists. The herbivores could 手段 up to 12 メーターs (40 feet) long and 重さを計る more than two トンs. They are distinguished by a crest that 事業／計画（する）s backward off the 最高の，を越す of the skull.
The three or four babies 述べるd in the paper did not yet have this cranial crest, and their skulls were not yet fused, 示唆するing they were in the 早期に 行う／開催する／段階s of 開発.
Scientists are not sure if they had hatched yet or if they met their demise while still in their 爆撃するs.
