They survived the K-T extiction event or K-Pg event which killed perhaps 75% of species in earth 66 million years ago.

While we are already causing an extinction event which will probably turn out far worse, by causing temperatures to rise to a level higher than in hundreds of millions of years - far outside the range modern life has adapted to. And I am not so sure that we ourselves can survive that in the long run. Humans are incredibly adaptable, that's right. But our food sources are not, not even things like grasses, wheat, or trees, let alone mammals, the great mayority of them (except perhaps algae and mushrooms) are far younger in an evolutionary sense, so it is unlikely they can adapt.