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Why do I get dizzy when I stand up?
Why do you get dizzy? If you've been sitting awhile, blood could pool in your legs, so there's less blood being pumped to your brain.
December 12, 2009
Why the media doesn’t talk about population
In past decades, "population control" and "overpopulation" were at the tip of everyone's tongues. So why don't we talk about population anymore?
December 8, 2009
Joel Breman thinks world can eliminate malaria by 2050
Joel Breman talked about a new class of drugs, and about bed nets, treated with insecticide, to offer protection against the malaria-carrying mosquito.
December 7, 2009
Herman Daly urges action on climate
Herman Daly believes the reality is that climate change will have negative consequences on humans and ecosystems.
December 7, 2009
David Hone: ‘U.N. urged to heed market in Copenhagen climate talks’
"With some clear thinking, with some good structure, and international agreement, we can actually shape a different energy future," says David Hone.
December 7, 2009
Online discussion today on population and climate change
How do population dynamics figure into the conversations about climate? Join this online discussion today.
December 2, 2009
Benjamin Glasser on making liquid fuel from coal
Listen to chemical engineer Benjamin Glasser talk about an innovative, cleaner process that could convert coal to liquid gasoline without producing as much carbon dioxide.
November 30, 2009
Jeffrey Sachs: ‘Copenhagen expectations unlikely to be fulfilled’
The Copenhagen climate summit is meant to produce a legally binding, agreement for reducing greenhouse gas emissions. Jeffrey Sachs hopes progress will be made.
November 30, 2009
Paul Robertson searching for cause of type 2 diabetes
Paul Robertson said type 2 diabetes is a genetic illness. Though you're not born with it, you can be born with a susceptibility to it.
November 30, 2009
Balloons: How high can they fly?
Helium balloons rise higher than hot air balloons. The current altitude record for a helium balloon was set by Malcolm Ross, who flew to over 113,000 feet.
November 28, 2009
