Heavy metals

Sean Ellia and daughter Lilly, 4 1/2, of South Hadley, Mass., look at the ball bearing exhibit. The bearings were made from different metals and therefore bounced differently when dropped.
hc-strange-matter-20121002-010

( rick hartford / October 2, 2012 )

Sean Ellia and daughter Lilly, 4 1/2, of South Hadley, Mass., look at the ball bearing exhibit. The bearings were made from different metals and therefore bounced differently when dropped.

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