Optical Illusions 36 - 39
![impossible triangle illusion](images/illus36.gif)
Impossible Triangle
![ascending staircase illusion](images/illus37.gif)
Perpetually ascending staircase...
how can the man go up all the time
and come back to the same place over and over?
![arrows are same length](images/illus38.gif)
Which is longest?
Actually, the Vertical lines are both the same length.
![](images/illus39.gif)
Stare at the Reversing Staircase Illusion until
it changes to a different staircase.