A good performance requires great dirt.
Arsenic and old manuscripts.
They're windows into the heart of the Earth.
Stories from the coolest day jobs in the world.
Air: It's one of the world's most important, least understood, and possibly life-saving substances
He just needs to get it to them
Multiple groups are trying to recycle used artificial limbs and devices like pacemakers.
Mike Biddle could free the world from having to make new plastic. Forever.
Why would a petro-state erect a solar-powered eco-metropolis in the middle of the Arabian desert? To change the world.
One full week of keeping track of absolutely everything, to see if gamification can net you a win in the game of life
The National Mall was transformed into a futuristic commune for the past two weeks as 20 teams from four countries erected solar-powered homes
Welcome to the wonderful world of compost toilet tech
More than 50 of the most dangerous, disgusting, humiliating and just plain bad professions
Which industries do the most damage to the environment?
Harry Schoell's engine uses superhot steam to make a cleaner, more efficient car. With video of the inventor demonstrating the engine
Western architects have grand plans for helping China solve its expanding environmental crisis. But the world's dirtiest country already has the power to clean up all on its own
Joseph Longo's Plasma Converter turns our most vile and toxic trash into clean energyâ€”and promises to make a relic of the landfill
A researcher is building a tool that will help police locate a body earlier -- and possibly tell when the victim died.
Energy: Some say it's too big a job, but scientists would sure like to try.
Corporate responsibility looms large at this year's show, but protesters insist more companies need more proactive electronics recycling policies
The planet has limited resources of several important elements, many of which can do what no other element can. Here's what's left of the periodic table, and what would happen if we run out