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Rogue Planets Could Harbor Life
If a planet was ripped from the warm cradle of its solar system and plunged into the frigid depths of space, it could still hold on to a liquid ocean — and maybe life — beneath an icy crust.
Planet formation models suggest that small planets are regularly flung from their solar systems by close encounters with neighboring gas giants. The giants’ gravitational fields create an interplanetary slingshot effect, sending smaller planets on unstable orbits that quickly leave their star behind.
Prior to ejection, some of those planets could conceivably be like Earth, with continents, oceans and...
Ghonim Rejoins Egypt's 'Internet Revolution' Amid Reports Mubarak Will Step Down
Egyptian Wael Ghonim, center, a 30-year-old Google Inc. marketing manager who was a key organizer of the online campaign that sparked the first protest on Jan. 25, talks to the crowd in Tahrir Square, in Cairo, Egypt, Tuesday, Feb. 8, 2011. A young leader of Egypt's anti-government protesters, newly released from detention, joined a massive crowd of hundreds of thousands in Cairo's Tahrir Square for the first time Tuesday, greeted by cheers, whistling and thunderous applause when he declared: "We will not abandon our demand and that is the departure of the regime." (AP Photo/Tara...
Google Lets Users Double-Down on Account Security
The net is getting a little safer for Google users Thursday, as the company is unveiling an option for Google users to lock down their accounts with more than just a password.
Starting Thursday all Google users can choose to turn on a so-called “two-factor authentication” feature, which will require them to type in a special, short-lived second password in addition to their normal password to get into their account. Users will be able to get the codes via SMS or a phone call, or use smart phone apps for Android, iPhone and Blackberry to generate the codes.
The idea isn’t new, even though this i...
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