“The dogmas of the quiet past are inadequate to the stormy present. The occasion is piled high with difficulty, and we must rise with the occasion. As our case is new, so we must think anew and act anew.”
Abraham Lincoln, US President (1809-65).
Monday, 24 October 2016
Now you see them, now you don’t - Here's why you can't see all twelve black dots in this optical illusion.