zoom out, tune in

One of my favorite new sites is Earth Observatory, which engages in macro-level earth science based on satellite images. For a glimpse of what that means, check out the Image of the Day archive. Yesterday we learned that scientists estimate that more surface area is devoted to lawns than to any other single irrigated crop in the country. For example, American lawns appear to cover more than three times the number of acres that irrigated corn covers. Wow.

And if you're into satellite imaging, why not track them online in real time?