Since the inception of the National Park Service 100 years ago, individual parks have kept lists of what animals and plants live in them.

On May 12th, I had the opportunity to attend the International Labor Rights Gala. At the Gala, there were various food stations that served tasty pastas, sliced meats, fruits and vegan bites.

Once we lose a species we never get it back. There are always those who ask, "What's the big deal about one bird?" The web of life - the creation all around us - is ours to protect. And we know that if a species like the golden-cheeked warbler is in trouble, it means entire ecosystems are in trouble.

Today is Endangered Species Day. Every year for a decade, people across America have spent this day recognizing the plight of endangered species and the need to do all we can to help these imperiled animals (and plants) recover.

As the world's nations hammer out an agreement to stabilize the climate, American corporations continue to receive leases to public lands for pennies on the dollar to drill, mine and frack.

Human safety must be the first priority. And any trainer who believes they can fix any dog no matter what has an overabundance of hubris and a serious lack of understanding of dog behavior.

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Many of us grew up being told raccoons definitely have rabies when they are seen during the day. However, a raccoon that's active during the day is not necessarily sick or dangerous.

Felicia Marcus has a knack for accepting jobs just before crises occur. Just before the California drought hit, Marcus agreed to serve as Chair of the California Water Resources Control Board.

The tiny Maui's dolphin, whose evolutionary path has out-maneuvered that of the brainiest predator in the ocean - the killer whale - now faces near extinction at the hands of man.

Free speech alone is not sufficient for delivering the conditions for reasoned debate. It is impossible without trust and sincerity, and Stanley suggests this is the first critical piece in the puzzle he calls The Ways of Silencing.

His movements were first recorded in Wyoming in 2008. He took off in 2009, heading south for hundreds of miles. He traveled across inhospitable lands looking for a place he might fit in and finally settled in Colorado.

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You could call it the battle of the attorneys general: one side representing the public interest, exactly what attorneys general are supposed to do; the other side representing the special interests, exactly what they are not supposed to do.

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It is impossible to look out over the winding waterways and lush green wetlands of the magnificent Okavango Delta and fail to understand the importance of conserving the natural world.

Philadelphia's Cione Field in the Riverwards area used to be one of those special places where one could enjoy the gentle breezes of spring and summer while sitting on a bench with a chicken salad sandwich.

President Obama's speech at Howard University earlier this month was both inspiring and practical -- in fact, his underlying point was that those two things are deeply intertwined. "You have to go through life with more than just passion for change; you need a strategy," he said.

It's "Infrastructure Week," and a nonpartisan coalition of public- and private-sector stakeholders has chosen May 16 to 23 to promote the need for government to invest in improvements to "roads, bridges, rails, ports, airports, pipes, the power grid, [and] broadband."