Did you know that giraffes have a black tongue? I learned that from Salute Your Shorts. Giraffes also have an advanced circulatory system; a giraffe's heart can weigh up to 22 lbs and must pump twice the normal amount of blood pressure in order to maintain circulation to the brain. At an average of 1.9 hours a day, they also have one of the shortest sleeping requirements of any mammal.
The evolution of the giraffe's long neck is subject to debate. The traditional theory is that this would have allowed them a competitive advantage in reaching foilage beyond the reach of other grazing mammals. An alternative theory proposes that long necks evolved as a secondary sexual characteristic; a sort of one up manship in the fierce courting ritual of "necking" contests to establish dominance and gain access to prized mates.
So what is Penelope Cruz's excuse?
via psd
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