Evolutionary Origin of Walking
It is theorized that "walking" among tetrapods originated underwater with air-breathing fish that could "walk" underwater, giving rise to the plethora of land-dwelling life that walk on four or two limbs. While terrestrial tetrapods are theorized to have a single origin, arthropods and their relatives are thought to have independently evolved walking several times, specifically in insects, myriapods, chelicerates, tardigrades, onychophorans, and crustaceans.
Read more about this topic: Walking
Famous quotes containing the words evolutionary, origin and/or walking:
“The point is, ladies and gentlemen, that greed, for lack of a better word, is good. Greed is right. Greed works. Greed clarifies, cuts through, and captures the essence of the evolutionary spirit.”
—Stanley Weiser, U.S. screenwriter, and Oliver Stone. Gordon Gekko (Michael Douglas)
“High treason, when it is resistance to tyranny here below, has its origin in, and is first committed by, the power that makes and forever re-creates man.”
—Henry David Thoreau (1817–1862)
“That is what war is and dancing it is forward and back, when one is out walking one wants not to go back the way they came but in dancing and in war it is forward and back.”
—Gertrude Stein (1874–1946)