I am old enough to have been fooled many times by many things in my lifetime. But it’s not always my fault. Sometimes it’s the limits of our senses.
This was demonstrated to me yet again by a clever video on the EarthSky website entitled “How Your Brain Plays Tricks On You”. Rather than try to describe it (remember, a picture is worth a thousand words), I recommend you watch it for yourself. Here is the link — http://earthsky.org/human-world/brain-tricks-optical-illusions-asapscience-video
It’s really a fun video!