earth day 2009

PopSci is celebrating Earth Day in all kinds of green ways! Check out our gallery to see what we're doing for the planet today, and to discover the science behind our decisions.

We just live on Earth; the GeoEye-1 satellite orbits it 15 times a day, 420 miles high, at 16,800 miles per hour.

Here are some dazzling photos from its ultra-high-resolution spaceborne camera.

During the late 1960s and early 1970s, the words environmental and green were hardly a blip on America’s radar. There were no catalytic converters, no smog emissions, none of the checks we have on automobiles now. Most of the vehicles on the road were powered by V-8 engines and guzzled filthy leaded gasoline. Their poor gas mileage wasn’t even a consideration.

Earth Day is a big deal here at PopSci. It's a time for admiring our incredible planet, and for giving back-- to the Earth, and to our readers (that means you). We've teamed up with the BBC to bring you a gallery of stunning images from the popular Planet Earth series, video clips (so you can appreciate the full affect), and our most extravagant giveaway yet.

Yep, that’s right. Mickey proves Kermit wrong in the whole “it’s not easy being green” arena with the release of Disneynature’s first film, Earth. Opening today in theaters, the movie follows three animal “families” on a journey for survival across our planet.