For the past 15 years Cat Cafes the world over have been delighting fans of coffee and kittehs who enjoy taking a wee paws for stress-relieving refreshment.

These 14 homes and commercial buildings make use of the renewable energy, heat and cooling power found deep beneath the crust of the earth.

These 12 concepts for city transportation include bike monorails, elevated buses that hover over vehicular traffic and cars that double as apartment balconies.

Photographer Alexander Safanov captures the annual 'sardine run' off the coast of South Africa in this incredible series of underwater images.

These 8 oddly cute eco-friendly characters epitomize the subtle way Japan's governmental and corporate entities greenwash their environmental initiatives.

Is that hummingbird watching you? Maybe. Check out these 11 robotic animals including surveillance birds, cargo-carrying mules and pollution-sniffing fish.

All it takes to turn an ordinary disposable plastic bottle into a simple, surprisingly durable birdhouse is heating it and molding it into shape.