If you’ve ever looked through a polarized lens or film, you may have noticed a rainbow of colors existing in the clear plastic. That’s polarized light, and it can only be seen by humans. But how does it work, and why can only humans see it?
Stop robocalls for good with Kim’s eBook
Robocalls interrupt us constantly and scam Americans out of millions of dollars every year. Learn Kim's best tricks for stopping annoying robocalls in this handy guide.