Well it has been proven that no all bears can climb trees only a few can. so fact!
I would say the correct answer is the native Americans' peaceful 9 months occupation of Alcatraz island.
<em>How it works. </em><em>A camera obscura is a dark room with a small hole in one wall in its simplest form.</em><em> When it's bright outside, light enters through the hole and projects an upside-down image of the outside world onto the wall opposite the hole.</em>
