SMurf

How do the Vedas explain dinosaurs, since these creatures according to carbon dating are reckoned to have roamed the earth for starting from at least 135 million years ago and becoming extinct 65 million years ago. Bones of these creatures have been found all over the world, suggesting that humans did not exist during this period?

Do yugas occur only the earth planet, or does it affect all astral and causal planets also, and if so simultaneously - i.e it would be kali yuga in heaven now also ?