No less than three premieres took place in Portugal yesterday, when the first Nissan Leaf in the country was plugged into the country's first electric vehicle charging station for the first time. The event took place near the Park of Nations in Lisbon, where Prime Minister Jose Socrates drove and charged Nissan's EV.

This is the coolest toy I've ever seen: the Parrot AR.Drone, a remote-controlled helicopter with a twist. It's controlled over Wi-Fi from an iPhone or iPod Touch, and it's got a camera in its snout that streams to your iPhone's screen. The copter itself is computer-stabilized, so controlling it is much easier than the standard $40 toy RC helicopter you may be familiar with. But it should be: it'll cost in the neighborhood of $500, when it ships this year. You'll get about 15 minutes of battery-powered fun on a one-hour charge.

13-year-old American boy is set to attempt to climb Mount Everest, in an effort to be the youngest person to scale the world's highest peak. Jordan Romero has set off from Nepal's capital, Kathmandu, to the base camp on the Chinese side of the mountain. He will begin his ascent there, along with his father and stepmother.

Earth Day is a day designed to inspire awareness and appreciation for the Earth's environment. It was founded by U.S. Senator Gaylord Nelson as an environmental teach-in held on April 22, 1970. Earth Day is celebrated in spring in the Northern Hemisphere and autumn in the Southern Hemisphere. Many communities celebrate Earth Week, an entire week of activities focused on environmental issues.

Smile: It does not cost anything' is a sentence that most of us would have heard or seen somewhere. This is because smiling and laughing are positive attitudes that cause only positive effects on a person and does no harm. There are various health benefits of laughing. Some of them are long life and happiness.