Full of cold and tired from constant sneazing and wheazing I have nothing to write so offer these illusions instead. Everyone loves a good illusion.
I have always thought the moiré effect a bit disappointing but changed my mind on seeing the video at http://www.anopticalillusion.com/
The picture above just reinforces a very well known illusion. A&B and C&D are lines of the same length. Measure them.
The two faces of the man below Is not a new idea either but what I liked is that I -I don't know about you - just can't stop it flipping whenever I look at it.
Back to sneezing
Achoo! achoo! a chew! eschew! issue! as you! were.