According to the big bang theory, how old is the universe?

the constitution of the united states gave congress the absolute authority over immigration laws

i think the answer is a and i hope this ; ))

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.