Ancient tools discovered in Maryland show the first humans came to America 7,000 years earlier than previously thought

[Warpy]

4. uh, easily

Since indirect evidence is now continent wide, I think it's safe to assume humanity got here a lot earlier than that since they arrived in sustainably large numbers and were able to spread out.

The only things we don't know is who they were and how they got here, although a population in eastern Brazil dated to about 30,000 years ago was found to have originated in east Africa and had come via Melanesia and northern Australia.

It looks like the defining characteristic of humanity is a desire to see what's over that next mountain.