The world of dinosaurs got its maximal wealth and diversity in the Late Cretaceous.
Among these creatures were the large and tiny, predatory and herbivorous,
bi-pedal and quadripedal, fast runners and semi-aquatic giants.
Altogether they occupied and dominated almost all available ecological niches.
Nevertheless, the time of their flourishing became a beginning of a time of decline.
Mammals would soon become the new ruling inhabitants of the Earth.
This next era in the evolution of terrestrial tetrapods did not provide any place
for the dinosaurs.

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