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The Future of Trains

As the United States gears up for Thanksgiving and its busiest travel week of the year, might high-speed trains get people where they're going faster in the near future?

November 23, 2009

Tree Ring Science and Tomorrow's Water

Tree ring expert Kevin Anchukaitis, of the tree ring lab at the Lamont-Doherty Earth Observatory, part of Columbia University's Earth Institute, talks about the information available in tree rings...

November 18, 2009 — Steve Mirsky
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