November 22, 2015

Just because someone has “color blindness” doesn’t mean that they can’t see any color.

Do you have any color deficiencies in your vision?  If not, you should clearly see the number 74 above.  If so, you might see a 21 or no numbers at all.  Image: Wi...

June 27, 2015

When Kim and I set off to write a book about light, we did so because we thought it was a fascinating subject that seemed greatly underappreciated. In fact, one of the themes of our book is that light is found everywhere in a multitude of forms and does an amazing vari...

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