Image Credit: Captain Planet @ 20

If you're like me, when you think of Captain Planet, you're hit with a wave of nostalgia for your 1990s childhood. But even if you're a bit older (or younger), I'll bet you're excited to hear that the world's first and only eco-superhero is turning 20 years old this month, and is getting a party to celebrate.

Photo via OneThirtyBPM.com

Musician Paul McCartney isn't shy about taking a stand for animal rights -- the vegetarian superstar has talked about his journey to a meat-free diet and supported Meatless Mondays -- and now he's speaking up for another group: the monkeys that

Photo via ivillage.com

"One Tree Hill" stars Sophia Bush and Austin Nichols talked to

Photo via Love the Earth Film

Musician Imogen Heap announced plans to create and score a nature documentary -- with a twist: She's asking fan

Photo via =Manu=

They're rigid. They're quiet. They don't travel much. But that hasn't stopped some of the world's most famous trees from achieving celebrity status.