In the Dino age, the earth was covered with pre-flowering plants, notably ferns and conifers. Their primitive methods of pollination were outclassed by a novelty, flowers, designed to attract animals, mainly insects, who soon started specializing in collecting pollen and/or nectar. Together they cerated giant tropical forests on over half of the land. Most species were extinguished by the mega-asteroid which wiped out the Dinos, but enough survived as seeds. Mammals and birds became major seed eaters and propagators. The interaction between flowering plants and animals, specific to all kinds of environments, became the main motor of unprecedented fast evolution and changed most of earth's surface spectacularly.
—KGF Vissers