主要参考:
Evidence suggesting that earth had a ring in the Ordovician(2024)
次要参考:
A high-resolution summary of Cambrian to Early Triassic marine invertebrate biodiversity(2020)
The Great Ordovician Biodiversification Event: Reviewing two decades of research on diversity’s big bang illustrated by mainly brachiopod data(2015)
A 485-million-year history of Earth’s surface temperature(2024)
https://en.wikipedia.org/wiki/Great_Ordovician_Biodiversification_Event
https://en.wikipedia.org/wiki/Late_Ordovician_mass_extinction
https://en.wikipedia.org/wiki/Hirnantian_glaciation
https://en.wikipedia.org/wiki/Rings_of_Earth