The bees were around at the time the dinos lived, and so were ants.............why don't we ask them??????????

100 Ma	Earliest bees.
90 Ma	Extinction of ichthyosaurs. Earliest snakes and nuculanid bivalves. Large diversification in angiosperms: magnoliids, rosids, hamamelidids, monocots, and ginger. Earliest examples of ticks. Probable origins of placental mammals (earliest undisputed fossil evidence is 66 Ma).
80 Ma	First ants.
70 Ma	Multituberculate mammals increase in diversity. First yoldiid bivalves.
68 Ma	Tyrannosaurus, the largest terrestrial predator of North America appears in the fossil record. First species of Triceratops.