NASA recently released the video above for Earth Month 2013, part of a broad effort to raise awareness of the agency's Earth observation programs. It features a variety of big-picture imagery, including true-color satellite photos, data visualizations, computer models and time-lapse footage from the International Space Station.

For more, check out NASA's Earth Month hub, plus the related links below.

And happy Earth Day!

Russell McLendon ( @russmclendon ) writes about humans and other wildlife.