This week's tragic killer whale attack at SeaWorld has stirred controversy about the orca in question, Tilikum, and whether these dolphins should be captive.

Calling all explorers for a Martian treasure hunt! No spacesuit required. We can help discover new alien landscapes from the comfort of our computer chairs. Ready, set, click! Mars or bust…

The end of the year features some big indulgent holidays. With the new year almost upon us, take a moment to read up on these fascinating food-related stories.

The Hubble pierces the heart of outer space darkness, delighting us as our super eye in the sky. Here are 23 famous Hubble discoveries and NASA heavy hitters.

Solar and wind energy get a lot of time in the news, but what about all of the other fuel sources being considered? These are five of the more offbeat ideas.

Green architecture has caught on around the world, but some areas still shy away from it. These Istanbul architects are eco-friendly, but in an unexpected way.

From an "eco-smart" company placing ads on a Hummer to McDonald's literally painting its logo green, these 15 examples of greenwashing are totally absurd.

Animals are more than just our companions. We share a planet with them, and they often clue us in to fascinating new environmental knowledge.

Environmentally friendly fashion used to be an oxymoron, but designers are catching up to people who want to look great while keeping the Earth a healthy place.

A group of students in Utah learned that even small actions can have big environmental effects. Their class project will bring clean power to 44,000 homes.

Alternative energy is undergoing many changes and advances every year. These amazing stories about alternative energy have caught our attention recently.

If you thought your recycled electronics were always recycled safely and cleanly, think again. Many end up in toxic, unregulated dumps in developing countries.

Some protesters will do anything to call attention to their causes, like skinning and eating a cat or putting a dead whale in the street.

Sensational scientific discoveries, great new gadgets and terrific (as well as terrifying) technologies past, present and future await at the all-new Gajitz

Who says you can't invent a better mousetrap? This gigantic pitcher plant, discovered in the Philippines, is large enough to kill rats in its lethal leaf trap.