knowledge of iron-making
He never did reach it. He was only in north/South America.
the down side of an escalator
No, he never found North America.
the titanic was built in Ireland it never "reached us"
Native Americans migrated into Canada first. The earliest records are found to be dated around 26,500 BC.
knowledge of iron-making
by boats
Yes
He never did reach it. He was only in north/South America.
Beringia
By boat on the Mayflower.
never
That's more of a question for philosophers than mathematicians, but as far as mathematicians are concerned, you can approach it but never get there.
No he will never reach higher than 4
6000 b.C.e.
u can
Never