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Apr 22, 2015 02:00 PM ET // Jennifer Viegas
Male and female dinosaurs from the same species sported different looks.
Apr 1, 2015 08:33 AM ET // Jennifer Viegas
The dino couple, nicknamed Romeo and Juliet, were entombed together for over 75 million years.
May 31, 2011 08:52 AM ET // Tim Wall
An extremely rare bilateral gynandromorph cardinal makes a surprise visit to a backyard feeder in Texas.
May 25, 2011 07:58 PM ET // Tim Wall
Variety is the spice of life and animals know it pays to be flexible.
Jun 2, 2011 05:48 PM ET // Tim Wall
Female butterflies aren't interested in extra attention once they're pregnant.
Aug 1, 2011 08:55 AM ET // Tim Wall
Female southern elephant seals from an island between South Africa and Antarctica are skipping the traditional harems and finding equal opportunity for love at sea.