My friend just thought of a cool idea. How come the Dinosaurs died out 65 m.y.a.
BUT the mammals,insects,etc. were able to survive in small amounts.

I don't know if this will help

There have been many mass extinctions throughout the history of the Earth. Probably the most famous is the extinction that finally saw the end of the dinosaurs reign on the Earth, 65 million years ago. It wasn't just the dinosaurs that died out in this extinction. Whatever caused the death of the dinosaurs also caused the death of around 70% of all of the species on the Earth. Although the dinosaurs had been in a period of decline, it is thought that their recovery was prevented by some sort of catastrophic event. There are many theories about why the dinosaurs finally became extinct, some of which are more than a little outlandish.
The two main 'serious' theories are the asteroid and volcano theories, both of which make some use of the analysis of the rocks in and around the K-T boundary (the Cretaceous - Tertiary boundary). The use of K comes from the Greek word for chalk (Kreta) which is found in great quantities in the rocks of the Cretaceous.

Dinosaur Extinction Page

I think it had something to do with the fact that the smaller creatures didn't require as much food, any large creatures that did survive the initial extinction event would have eventually starved.

That about sums it up.

Yea it does. But there is a theory that some dinosaurs did survive. hmm

The book Evolution by Stephen Baxter has a few, IMO, well-written short stories pertaining to the matter of the dinsaurs' extinction. You should check it out.

Cool. Still, if some dinos survived, why have we not seen a single bone above the extinction mark?

Dinosaurs died out at the K-T event around 65 MYA. They occupied a large ecological niche. When the disater happened, the ecosystem was so damaged, that they couldn't survive anymore. Other animals didn't take up much 'space', so therefore they survived

just a thought u think the mammals could of chowed down on the dead dinos?? so theres alot of food and that could cause them to get bigger than rodent sized creatures? i dunno smack me if its a dumb question lol

That's could be true, but the main thing was that there was a HUGE ecological void left by the dinos, and the only advanced animals to take their place were the mammals. They were more adapted.

Well put Froggy...

Thank you