The burliest lumberjack with the best-oiled chainsaw couldn"t slice the massive "timbers" found in Petrified Forest National Park in northeastern Arizona. So why are these giant stone logs segmented in such symmetrical rounds, as if they"re ready to be split into firewood?
Petrified Forest National Park
Today in History
More Desktop Wallpapers:
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Fibonacci Day
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Mount Hamilton, near San Jose, California
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Casting a vote for women s history
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All in a day s work
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National Fossil Day
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Plitvice Lakes National Park, Croatia
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A summertime light show
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Happy Astronomy Day!
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Happy Mothers Day!
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An unlikely friendship in the wild
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Moody skies over Valletta
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Think deep thoughts
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The migrating monarchs of Michoacán
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European river otter, Netherlands
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Poinsettia Day
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A yearly sign that spring has sprung
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World Art Day
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The Pearl of Siberia
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A polar bear near Churchill, Manitoba, Canada
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Mona Vale Rockpool, Sydney, Australia
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Zion National Park turns 103
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Celebrate Mandela Day
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In the path of the pronghorn
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Welcome to the pack
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One for the books
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The Badlands celebrates a milestone
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Martin Luther King Jr. Day
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Naxos in the Cyclades Islands of Greece
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Peggys Point Lighthouse, Atlantic Coast, Nova Scotia, Canada
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It s World Poetry Day
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