Ailian World (異性体生物世界)は地球内部にあると言うもの....
Scientists believe the same fateful impact also formed the moon, but this is the first time they’ve studied the specific traces of the clash that remain behind in the Earth’s mantle.
In 2016, UCLA researchers proposed that Earth could actually be two planets that fused together after colliding: itself and Theia. At the time, scientists said they believe the two planetary masses mixed together uniformly. Now, Qian Yuan of Arizona State University and his colleagues suggest the mysterious dense spots in Earth’s interior are the specific pieces of Theia that are still intact.