Gotcha! New question:
Scientists have discovered fossils of 3 ancient reptilian animal species, and have been able to determine the following about their dates:
Of species A, scientists have found abundant fossils of it from 300 A.D. all the way to 1000 A.D.
Of species B, scientists have found abundant fossils of it from 300 A.D. all the way to 400 A.D.
Of species C, scientists have found abundant fossils of it from 450 A.D. all the way to 1000 A.D.
Scientists have noted that species A and B are very similar, both feeding on the same organisms and living in the same habitats, while species C is completely different from A and bears a slight resemblance to species B.
Additionally, from 1000 A.D. to the present day, the earth is dominated by mammalian species, and the majority of the reptilian species was wiped out.*
1. What happened with the three species in the years 350-450 A.D., roughly?
2. What does the previous scientific observation* describe?
3. What was happening in the few hundred years prior to the event described in question two?
-Dates aren't actually real, by the way, but the concept still applies. These dates and time frames are completely exaggerated, as the real processes would take millions of years.
-I may give hints, if necessary.
-Questions two and three assume that the press-pulse theory of Arens and West is true.
-Species A and B cannot interbreed.