The energy from the heat beneath the earth's surface is essentially an unlimited resource. What if it could be developed to help solve our energy challenges and fight global warming? Enhanced Geothermal Systems, or EGS, attempts to do just that. EGS produces heat and electricity by harnessing the energy from hot rock deep below the earth's surface, expanding the potential of traditional geothermal energy by orders of magnitude. EGS is a big challenge, but with the potential to power the world many times over, it demands our immediate attention. At Google we've launched an effort to advance EGS through R&D, investment, policy and information.

Shirky

Google has just launched Knol to the public, dubbed by many as the search giant

Change yourself. Change the world. Get your walk on.

What the Internet is doing to our brains

Every month thousands of websites get hacked into and have hidden links inserted into the pages by people wanting their spam sites to rank highly in the search engines.

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Browse through these political maps to learn about this year's race for the Presidency and show off your favorites by embedding them around the web for the world to see.

Track the most searched elections-related terms below, and find out which candidates are hot in different cities. Find out how other Americans stay politically engaged online.

We've just released in the US a new version of Google Talk designed specifically for the iPhone and iPod Touch browsers. In addition to sending your friends Gmail messages from your iPhone, you can now chat with them while you're on the move, too! In your iPhone browser, just go to www.google.com/talk, sign in and start chatting. That's it. Google Talk runs entirely in the browser so there's no need to download or install anything.