Filmmaker Ken Burns has explored baseball, jazz, the Civil War and more. Now, in a six-part series that premieres Sunday on PBS, he turns his lens on national parks, which Burns calls "America's best idea." He spoke to OnEarth magazine about his motivation for the documentary, what he learned...

Reason No. 137 that I love commuting by bike in New York City: I get to watch baby hawks go to flight school.

Last year, I was fascinated and then heartbroken by a pair of red-tail hawks that built a precarious-looking nest over the West Side Highway, produced...

Tomorrow is National Bike to Work Day, which is part of National Bike Month, coinciding with Bike Month NYC here in the Big Apple, and I have to admit that it's all making me feel a bit guilty.

Last summer, after I started working at NRDC's midtown Manhattan...

Last spring, I found myself entranced by a pair of red-tail hawks building a nest in Riverside Park, just a few blocks from my apartment in New York City.

Unfortunately, despite the efforts of their parents and the best wishes of many...

Where does your drinking water come from?

Natural historian Sidney Horenstein has been asking that question around New York City for decades. The answer he always gets is: "From the faucet."

This Sunday, however, is World Water Day, an event

Sometimes in New York, you get surrounded by steel and glass and brick and brownstone and it's easy to forgot that you live on an island -- and not a particularly big island at that.

Then it pours for one afternoon and the subways fill...

The snake discovered recently by scientists in Colombia was huge: as long as a school bus and heavy as a small car.

Its remains, now being studied at the University of Florida, are about as long as a T-rex -- which of course makes me start conjuring up wild...

Yesterday, my wife forwarded me an "Important Announcement Regarding Your Recent Purchase of Peanut Butter" that she got from Fresh Direct, the online grocery service here in New York City.

This was not a good e-mail.

As my wife will tell you, peanut butter is very important to me. She...