I want to know the answer to the following question:
When mamals appeared they remained small until what period?
All the background I'm provided with is that "Overall, however, the Earth was hotter than it is today. Non-avian dinosaurs appeared in the Late Triassic and became the dominant terrestrial vertebrates early in the Jurassic, occupying this position for about 135 million years until their demise at the end of the Cretaceous.". Is that enough to answer the question?
Answer: no