Uses different isotopes found within an item to learn something about that item (such as where a person grew up). See 'A Brief History of Climate Change'.
Fact of the Day
One of the English ships sent on the disastrous attack on Cadiz in 1625 had sails that had been used during the Armada, almost 40 years earlier.
Quote of the Day
"We are not makers of history. We are made by history. "
~ Martin Luther King, Jr.
On This Day
1660 Charles II marched into London and was restored to the throne after 11 years in exile.