No kekahi manawa lōʻihi, ʻo kekahi o nā mea pohihihi nui e hoʻopuni ana i nā dinosaur pohihihi ʻo ia ka hoʻomohala ʻana i kā lākou embryos. I kēia manawa ua hiki i nā ʻepekema ke wehe i ka pale o ka hūnā.
ʻO nā mea i ʻike ʻia a hiki i kēia manawa, ʻo ia nā dinosaur i hoʻokomo i nā hua, akā pehea ka lōʻihi o ka pale ʻia ʻana o nā embryo e ka pūpū, a pehea i ulu ai, maopopo ʻole.
ʻIke ʻia i kēia manawa ma ka liʻiliʻi o nā embryos o hypacrosaurs a me nā protoceratops i hoʻolilo i ʻekolu (protoceratops) i ʻeono (hypacrosaurus) mau mahina i kahi hua manu. Ua lohi loa ke kaʻina hoʻokomo. Ma kēia mea, pili like nā dinosaurs me nā moʻo a me nā crocodiles - ko lākou mau hoahānau kokoke loa, a nāu hoʻi e hoʻopaʻa lohi.
I ka manawa like, ʻaʻole wale ka momona, akā ʻo ka hoʻomohala ʻana o nā embrio dinosaur he mau ʻano like me nā kaʻina hana like i loko o nā manu o kēia manawa, me ka ʻokoʻa wale nō o ka hoʻoulu ʻana i nā manu i kahi wā pōkole loa. Ua paʻi ʻia kahi ʻatikala e wehewehe ana i kēia ʻike i ka puke pai ʻepekema PNAS.
ʻO kēia hopena i hoʻoholo ʻia e nā ʻepekema mai ka US National Academy of Science, nāna i aʻo i nā moʻo weliweli, mahalo i nā "hale kupapaʻu" o nā hua manu i ʻike ʻia ma Argentina, Mongolia a me Kina. I kēia manawa he nui nā hōʻike e pili ana kekahi mau dinosaurs i mehana koko a, e like me nā manu, hake i kā lākou ʻōpio. I ka manawa like, ʻoiai ko lākou mehana koko-koko a me ka hoʻokomo ʻana o nā hua manu, i kā lākou kūkulu ʻana akā kokoke lākou i nā crocodiles.
ʻO ke kumu nui i ʻae i kēlā mau hopena e huki ʻia ʻo ia nā niho embryonic i kapa ʻia. Me ka hele ʻole i loko o nā kikoʻī, hiki iā mākou ke ʻōlelo he ʻano ʻano like ia o nā apo lāʻau a me nā kumulāʻau. ʻO ka ʻokoʻa wale nō ka hana ʻia o nā papa hou i kēlā me kēia lā. A ma ka helu ʻana i ka nui o ia mau papa, ua hiki i nā ʻepekema ke ʻike i ka lōʻihi o ka hoʻoulu ʻana o nā hua.
ʻO ka loaʻa ʻana o ka Argentina a me nā "hale kupapaʻu" ʻē aʻe he mea nui, no ka mea, ua kaupalena ʻia nā huaʻai dinosaur fossilized i hoʻokahi mau laʻana, i pākuʻi ʻia e nā ʻāpana o nā pūpū. A i nā makahiki he iwakālua wale nō i hala ua loli ke kiʻi. Hiki iā ʻoe ke hōʻoia ʻo ka hopena ma luna i hana ʻia e nā ʻepekema kahi mamao loa mai ka hope.
