A billion websites, more than 4 billion Web pages and 2 percent of the Amazon rainforest? Here's how researchers have tried to estimate the size of the Internet.

You might soon be ditching your text passwords and unlocking your phone, apps and accounts with a doodle.

The memory capacity of the human brain could be as large as the entire World Wide Web, new research suggests.

A transparent material that can be attached to a smartphone's touch screen could help the device generate electricity whenever anyone taps it, researchers in China say.

Iridescent cells in the flesh of giant clams could one day help scientists design more efficient solar panels, and television and smartphone screens that are easier on the eyes, researchers say.

Smartphones equipped with portable devices that magnetically levitate cells might one day help diagnose diseases in the home, clinic or lab, researchers say.

A new portable fuel cell charger can charge a smartphone or tablet by combining saltwater and oxygen, say while you're basking in the sun on the beach.

A new pocket-size microscope could give you a closer look at the world around you.