An actual 6 year-old asked me the question today. I was at a loss.
**Edit**: a lot of interesting answers, food for thought, and ideas on how to explain it to a child. Many thanks to the community!
If I summarize:
* Dinosaurs lived for a very (very) long time, all over the earth, and there were countless different species of them.
* There were few of our ancestors, from just a few species, and most of their existence was confined to limited geographical areas.
* The conditions for a fossil to form are extremely rare, and they may have been even rarer for our ancestors than they were for dinosaurs.
In: 819
Fosils and bones don’t last much in warmer areas… They get degraded.
So most of the things we find has to be in areas that are cold or went through a process of either drying or frozen.
Interstingly, most of the bio diversity develops around the ecuator, meaning that we will never known most of the organisms that has existed.
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