Hi, let's think about one interesting hypothesis.
Suppose in someday all man-made things, from buildings to tools, are destroyed. People live in the situation just like in the prehistoric era. The only thing we can keep is modern knowledge. So, how long would it take for human to reconstruct the civilization like the current one?
What do you think?
Suppose in someday all man-made things, from buildings to tools, are destroyed. People live in the situation just like in the prehistoric era. The only thing we can keep is modern knowledge. So, how long would it take for human to reconstruct the civilization like the current one?
What do you think?