Why Europe backpedals on biofuel targets

Ethanol and other biofuels are boosting food prices and greenhouse gases, says a new British report.

Scientists challenge General Relativity. And Mr. Einstein wins again.

Two tests use cosmic laboratories to question if the laws of physics are universal.

Final flight of the NASA shuttles

High-tech firefighter

Ikhana, a pilotless plane with thermal-infrared imaging sensors, sends wildfire mapping data via satellite to firefighter' computers.

More geek speak hits Merriam-Webster

TV networks vs. social networks

Politics on Facebook brings trouble for young Egyptian

Ahmed Maher says he was arrested and tortured by Egyptian authorities for starting a group on the popular social-networking site that was intended to support a nationwide strike.

Skyscraper farming

A futuristic concept converts skyscrapers into crop farms that could help reduce global warming, improve the urban environment, and help feed the world's growing population. How it would work:

Narragansett's ecosystem shake-up

Sonar enters the third dimension

New style of 3-D sensors lets ships avoid hidden obstacles.

Violin’s secrets come out of the woodwork

Horizon highlights – July 4 weekend

Shake-and-bake word collage

Study abroad through Second Life

Virtual college campuses host international student exchanges.

Hurricane drones

In Olympian swimsuits, threads of history

The full-body LZR Racer is seen as a breakthrough in reducing drag. Suits have changed dramatically in recent decades.

The Internet’s perfect swarm

BitTorrent software utilizes the Internet’s most valued asset – the user community – to share the burden of increasingly larger downloads, such as movies and games. An unlimited number of users in a network can “swarm” a file and simultaneously consume it, divide it, and pass it along, making the process fast and efficient.

Could the Large Hadron Collider destroy Earth?

Planes, trains, and automobiles – the Internet hits the road

Chrysler’s big Wi-Fi announcement means the Web is even more ‘world wide,’ but is that a good thing?

Rhapsody charges headlong into iTunes territory