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Dr. Mark Lindsay was 5 years old when he first learned that tree trunks were brown. "Up until that point, I believed leaves and trunks were all green. Just lighter and darker shades," Mark said. Mark ...

The popular belief is that chameleons change color solely to disappear into their surroundings. While camouflage does play a part, it is not the only or even the primary reason. Chameleons also alter ...