View full lesson: http://ed.ted.com/lessons/why-are-human-bodies-asymmetrical-leo-q-wan Symmetry is everywhere in nature. And we usually associate it with beauty: a perfectly shaped leaf or...
========== Symmetry is everywhere in nature,and we usually associate it with beauty:a perfectly shaped leaf,or a butterfly with intricate patterns
mirrored on each wing.But it turns out that asymmetry
is pretty important, too,and more common than you might think,from crabs with one giant pincer clawto snail species whose shells'
always coil in the same direction.Some species of beans only climb up
their trellises clockwise,others, only counterclockwise,and even though the human body
looks pretty symmetrical on the outside,it's a different story on the inside.Most of your vital organs
are arranged asymmetrically.The heart, stomach, spleen, and pancreas
lie towards the left.The gallbladder and most of your liver
are on the right.Even your lungs are different.The lef...
