Earth's
Oldest Known Object on Display - AP, April 8,
2005
A tiny speck of zircon crystal that is barely visible to the eye
is believed to be the oldest known piece of Earth at about 4.4 billion
years old. For the first time ever, the public will have a chance
to see the particle Saturday at the University of Wisconsin-Madison,
where researchers in 2001 made the breakthrough discovery that the
early Earth was much cooler than previously believed based on analysis
of the crystal...
Earth’s Oldest Known Object on Display
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