Science

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Piles of Problems Make the Gates Foundation Rethink our Most Useful Invention: The Toilet

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Tips from Ashoka's Top Social Entrepreneurs

One room, packed with 1,000 bustling social entrepreneurs, is bound to muster innovative ideas to change the world. It’s the Ashoka Changemakers association that makes it possible.

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Spotlight on Young Global Leader: Heather Fleming

Heather Fleming has been named one of the World Economic Forum's Young Global Leaders for 2010.

"Start small with things we know are effective," suggests Esther Duflo. Photo: <a href="http://www.flickr.com/photos/kalyan3/2313765916/">kalyan3 (Flickr)</a>

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Esther Duflo: Most Promising U.S. Economist

Esther Duflo is once again in the news, this time for having won the John Bates Clark medal.

Esther Duflo speaking at Pop!Tech in 2009. Photo: <a href="http://www.flickr.com/photos/kk/4039861869/">kk + (flickr)</a>

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A 'Rising Star' in Economics

Ever wonder why some development projects succeed while others fail?

Wadango has already distributed around 10,000 solar-powered lanterns. Photo: <a href="http://www.flickr.com/photos/virgomerry/11227682/sizes/m/">**Mary** (flickr)</a>

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Solar Powered Lights in Kenya

In rural Kenya nearly everyone uses kerosene as their main source of power.

Eritrean child receiving a vaccine. Photo: <a href="http://www.flickr.com/photos/kioko/3065244324/">daveblume (flickr)</a>

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On a Mission to Vaccinate

The Bill & Melinda Gates Foundation announced a $10 billion-commitment over ten years to vaccinate children in developing countries on Friday.

Antiretroviral drugs. Photo: <a href="http://www.flickr.com/photos/sunshine6/3337774882/">shortie 66 (flickr)</a>

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New Agreement Lowers Price of HIV/AIDS Medication

An enormous barrier in the fight against HIV/AIDS in developing nations has started to crumble.

A photo of what is believed to be William Kamkwamba's first windmill. Photo: <a href="http://www.flickr.com/photos/whiteafrican/622366993/">whiteafrican (flickr)</a>

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William Kamkwamba: Malawi's Boy Wonder

When I was fourteen, I was busy going to drama rehearsals, shopping at the mall and fighting with my brother.

<em>Plasmodium falciparum</em> (malaria) parasite taking over red blood cells. Photo: <a href="http://www.flickr.com/photos/ericfortin/2186584614/">Eric Fortin (Flickr)</a>

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Cellscope: There's an App for that

A team of engineers at the University of California at Berkeley are pushing the limits of cell phone technology with the development of their newly minted Cellscope.

The Mekong River. Photo: <a href="http://www.flickr.com/photos/tashandsmoked/1357553641/">tashandsmoked(flickr)</a>

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Before it reaches the sea, the Mekong River travels more than 2,500 miles through Tibet, China, Burma, Thailand, Laos, Cambodia and Vietnam. It is estimated that more than 60 million people depend on the river in some way.

A new mobile technology is helping battle HIV in Biwindi, Uganda where most people walked days through the tough terrain to get medical care. Photo: <a href="http://www.flickr.com/photos/youngrobv/2282046318/">youngrobv (Rob & Ale)</a>

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Uganda's New Mobile Technology

Could you imagine having to walk a full day to get medical care, and then wait weeks to learn your test results?

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Simple Technologies with Complex Ambitions

Have you heard of "appropriate technology?" It's a movement that helps the world’s poorest people with affordable, simple and practical inventions that address every day problems.