Saturday, August 23, 2008

World's tallest tree in arboreal witness protection program



http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2008/08/17/TRT611L3TL.DTL

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Friday, August 15, 2008

Sunday, July 6, 2008

Amazing striped icebergs

Icebergs in the Antarctic area sometimes have stripes, formed by
layers of snow that react to different conditions.

Blue stripes are often created when a crevice in the ice sheet
fills up with meltwater and freezes so quickly that no bubbles form.

When an iceberg falls into the sea, a layer of salty seawater can
freeze to the underside. If this is rich in algae, it can form a
green stripe.

Brown, black and yellow lines are caused by sediment, picked up
when the ice sheet grinds downhill towards the sea.




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