Altitude sickness: What is it, what does it do?

People with altitude sickness feel tired and nauseated - have a headache - and may feel strangely uneasy.

Gene protects grains from disease

A gene protects grains (wheat, rice, corn, barley) from disease. Our species owes its survival in part to the stoutness of the disease-resistant gene in grains.

Wine tastes better when it costs more

Does some wine taste better just because it costs more? Scientists held a wine tasting inside an MRI scanner to find out.

A cholera early warning system with satellites?

As Earth's climate warms, surface waters remain warm for longer and lengthen the "cholera season" for countries like Bangladesh. Marine microbiologist Rita Colwell describes a cholera early warning system that could help combat outbreaks.

Nobel laureate brings microcredit to poor in Latin America

Microcredit - loans to the poor made without collateral - is catching on in Latin America with the help of the Whole Planet Foundation, according to Muhammad Yunus.

Quantum computers key to deeper knowledge

David Deutsch talks about quantum computers in his book, The Fabric of Reality, and "tries to present a unified world view that incorporates all our best knowledge."

Lead in our drinking water with Marc Edwards

Do Americans take safe drinking water for granted? Is there lead in our drinking water? Learn more from Marc Edwards, a civil engineering professor at Virginia Tech.

Ecological debt day: What is it?

By early October, we humans had already consumed all the resources Earth will produce for 2007. That's the basis of Ecological Debt Day, announced by Mathis Wackernagel of the Global Footprint Network.

Seed diversity essential to future food supply

Earth's climate and weather are tied to our food supply. And many scientists who model future climate believe that temperatures will rise and patterns of rainfall, freeze, and drought will become less certain while population increases.

Doomsday Vault stores the world’s crop diversity

Not far from the North Pole, deep in a mountain on a remote Norwegian island, is the Doomsday Vault. It will store a backup collection of the world's seeds.

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