1- The beginning of civilization is believed to start in with Mesopotamians in Mesopotamia.
2- The humans started to invent language and writing.'
3- The beginning of world civilization also lead to first explorations and innovations.
4- The beginning of civilization was also a start to finding new ways to advance their ways.
5- They were just as curious as us humans today.
6-Their bodies were different than ours, they were believed to have more hair and were believed to be taller than today's average human being.
7- They died faster than we did, due to unknown illnesses.
8- They were the start to developing religion and beliefs.
9-They hunted bigger mammals than what we currently rely on farmers for our food supply.
10- Agriculture was soon to be introduced by later civilizations which like on number nine, they relied on mammals and anything they can find to survive.
The closest one is the last one. He can veto bills that he doesn't like. That means it has to go back to both houses. They can re-submit it with a 2/3 majority and his veto can be overridden and it becomes law without his consent.