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When dinosaurs went extinct, they left a vast array of empty niches. These were soon filled by the now rapidly evolving mammals.
If not people not killing them anymore then most probably it's because they have much more abundant food sources, as in there is more prey avaliable.
rapidly
more rapidly and most rapidly
more rapidly, most rapidly
more rapidly
more rapidly
He rapidly drove through the puddle.The police arrived rapidly.
The whirlpool spun rapidly.
more rapidly
more rapidly
more rapidly