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Pluto May Be Erupting

Two mountains that look like giant volcanoes hint at current activity on Pluto.

What to Look for at Pluto

As New Horizons closes in on Pluto for its July 14 encounter, what questions should be asked?

Inflation Concocted to Avoid a Young, Perfect Universe

Alan Guth concocted inflation theory in 1980 to avoid evidence for a 10,000-year-old universe. For his wild, evidence-free speculation, he may win a Nobel Prize.
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