Facebook stock climbs after upgrade (Update)

(AP)—Facebook's stock is climbing after an upgrade from an analyst who believes Wall Street is underestimating the company's potential to grow revenue.

How low can Facebook go?

Two weeks after the largest, most anticipated IPO in years, Facebook shares keep going down. And down. And down. And investors want to know how far they can go.

Long-awaited Facebook IPO looms in New Year

Facebook co-founder and chief executive Mark Zuckerberg has deflected talk of going public for years but it looks like it is finally going to happen in 2012.

Decadal survey of astronomy and astrophysics

A new report by the National Research Council identifies the highest- priority research activities for astronomy and astrophysics in the next decade that will "set the nation firmly on the path to answering profound questions ...

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