Just about every piece of fruit has a little sticker on it, and every vegetable has a scanning label associated with it. Learn how to read produce labels.

The atoms in the body of an average person corresponds to about 1.6 gigatons of TNT in energy. The likelihood of spontaneous explosion is low, similar to that of the Large Hadron Collider to cause any harm.

Sweet potato tops corn in ethanol fuel study. We should ramp up sweet potato production for ethanol and put more corn back into the food supply.

Bruce Rittmann talked about creating microbial fuel cells that use organic waste to create energy. Read more in using bacteria to make energy from waste.

Joachim von Braun of the International Food Policy Research Institute in Washington, D.C. said that biofuel policies may lead to higher food prices.

Scientists have linked car exhaust with higher risk of heart disease. That's according to a study led by research toxicologist John Incardona that started with fish.

Adventures in ecotourism: My trip to Cusco, Peru. Read about the Manu jungle and whether the ecotourism industry in Peru is really eco-friendly.

What will the future will be like? According to Ray Kurzweil, technologies are going to transform everything we do.

"If things work the same in people as in mice, and you had a perfect drug, you might imagine that you could extend life span by 20 or 30 year," said MIT biology professor Lenny Guarente. Hear more about an anti-aging gene that might extend the human life span.

A student from Laos wonders how long humans might live. An MIT biologist responds, and talks about new research that could help extend our lifespan.