How Did They Do That?

I've always been amazed by the pyramids and the Great Wall of China. I want to see them in person one day. How did they build these structures with the technology they had (or not), without the help from aliens?


Michael Phelps is just simply amazing. Eight freaking gold medals.... I wish I could have him teach me how to swim. I am sure he won't need my money as he already has a 7-figure income from Speedos and other sponsors, so I can just pay him in another way... LOL.

I also want to know how they did this... Umm... Somebody teach me!