Spencer Kelly examines how Iceland is looking to be the first country to run completely on renewable energy.

Cyberbullying affects more young people than previously thought with a "growing trend" in abuse on social networks, a new survey suggests.

The chief of Las Vegas' Consumer Electronics Show reveals that Microsoft is returning to the event and will have a large presence at 2014's event.

The BBC's Richard Taylor looks at a new solar charging chip which allows panels to plug into and power a device directly, without the need for a battery.

A team of dentists creates a toothbrush they say can clean teeth thoroughly in less than six seconds.

Twitter co-founder Jack Dorsey and an account used by Iran's President Hassan Rouhani discuss Iran's social media ban by tweet.

A committee set up by the US aviation regulator has recommended relaxing a ban on gadgets being used during take-off and landings.

The FBI says it has arrested the suspected operator of the Silk Road - a website used to buy and sell drugs and other illegal materials.