“the Nazca lines in Peru”
I’ve never understood how ancient people did such large-scale designs so perfectly. Even the white chalk horses in Britain are hard to understand - the Uffington horse is stylistically so beautiful:
https://en.wikipedia.org/wiki/Uffington_White_Horse
Their expertise in the accomplishment is something to consider.
That they found the hours in the day to work on it, yet another. Staying alive and fed as they pursue their destiny.
Here we are with a thirst for knowledge of who exactly was brave enough to see an egg come out of a chicken and make the decision to eat it. How to eat? Shell or no shell? Boiled or fried? How best to use when preparing a meal?
The experiment had to begin by someone, somewhere.
Life’s little mysteries.
Some might be easily solved (the moving rocks on the Death Valley floor)
http://www.sci-news.com/physics/science-death-valley-sailing-stones-02148.html
And others, perhaps never solved; remaining an enigma.