In southeastern Colorado the Purgatoire River flows beside an extensive bed of dinosaur footprints in Picketwire Canyon. I went to see the dinosaur tracks, but the most memorable event of the trip was ...

Two new studies into lizard colors reveal how one species maintains its colorful diversity while others are losing their ...

Or the lizards might learn through experience which rocks keep them safest, or which rocks other lizards with similar colors tend to get plucked from. Alternately, there may be a totally different ...

Three near-identical U.S. lizards have kept their identities for millions of years in a way that researchers compare to the ...

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