Rather than being separated by expansions of ocean, the continents formed a mass known as Pangea. Dinosaurs lived for about 170 million years, and during that time, the continents gradually spread to form the shapes we recognize today. (Thanks, plate tectonics!) Dinosaurs continued to live on ...
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What animals lived on Pangea? Were mammals extinct in the Cretaceous Period? Did the crinoids go extinct during the Cretaceous extinction? How did dinosaurs survive the Triassic extinction? What did non-theropod dinosaurs evolve to? What dinosaurs lived in Australia? How many animals died in Jurass...
The differentiation between these layers is due to processes that took place during the early stages of Earth’s formation (ca. 4.5 billion years ago). At this time, melting would have caused denser substances to sink toward the center while less-dense materials would have migrated to the crus...
So, despite its murderous image, the Chicxulub impact seems to lack WMEs (Weapons of Mass Extinction). What about our other suspect? Suspect B –climate changecaused by massive volcanic eruptions This one has a rap sheet as long as your arm. Unlike asteroid impacts, this suspect is a know...