Question

why there is no dinosaur in earth? ​

Answer 1

Answer:

The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. ... This suggests that a comet, asteroid or meteor impact event may have caused the extinction of the dinosaurs.

Answer 2

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actually !The last dinosaurs died approximately 65 million years ago. Although the cause of their extinction is still a mystery, climatic change, diseases, changing plant communities, and geologic events could all have played a role.