With over 230 recognized species, chameleons are famous for changing color, but not for the reason most people think. A 2015 Nature Communications study revealed the true mechanism: tunable guanine nanocrystals in their skin that shift light wavelengths for communication and temperature regulation.

When you're out herping, crouched by a pond or flipping logs in the heat of the day, it’s easy to...

High in the rainforests of New Guinea, eastern Indonesia, and northern Australia, the green tree...