Alibaba Buys Back 20 Percent Stake From Yahoo for $7.1 Billion
Chinese e-commerce site Alibaba has bought half of Yahoo's stake in the company -- 20 percent of Alibaba's shares -- back from Yahoo for $7.1 billion.

First Earth-Size Planets Found in Space
Scientists using NASA's Kepler space telescope say they have found two planets orbiting a distant star -- and say the planets are the first ever that are the size of Earth or smaller. That could be critical in the search for extraterrestrial life.

Ex-Facebookers: About Ideas, Not Wealth
Facebook’s stock market debut seems to be creating a frenzy everywhere but  Facebook. Shares have been fluctuating between $40 and $42, as of 2 p.m. ET since opening Friday morning, amid reports that  Nasdaq was experiencing some technical hiccups. Gizmodo reported shares were trading at...

Reports: Nasdaq 'embarrassed' at Facebook delay
The CEO of the Nasdaq stock exchange says it is "humbly embarrassed" by its bungling of Facebook's hugely anticipated debut as a public company on Friday.

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Facebook is set to launch its initial public offering.

Solar Eclipse Visible This Weekend
If you live in a band across the southwestern United States, twilight will seem to come early on Sunday afternoon, well before the sun actually sets.