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KWADUKUZA, South Africa--A Zulu crowd's ululations welcomed Jacob Zuma, president of the Republic of South Africa, back to KwaZulu–Natal, his home province. He had come to tell them of his commitment to bring them, and the rest of the nation, better access to energy--as well as to announce the distribution of solar-powered hot water heaters and LED lighting systems as well as clean-burning cookstoves. [More]

A mysterious, centuries-long cool spell, dubbed the Little Ice Age, appears to have been caused by a series of volcanic eruptions and sustained by sea ice, a new study indicates. [More]

Correction appended. [More]

More than 20,000 radio antennas will soon connect over the Internet to scan largely unexplored radio frequencies, hunting for the first stars and galaxies and potentially signals of extraterrestrial intelligence.

Leonardo da Vinci 's drawing of a male figure perfectly inscribed in a circle and square, known as the "Vitruvian Man," illustrates what he believed to be a divine connection between the human form and the universe. Beloved for its beauty and symbolic power, it is one of the most famous images in the world

The medical marijuana drug Sativex, which could be approved in the United States in the coming years as a treatment for pain relief, has little potential for abuse, experts say. [More]

Earlier this month, the scientists who altered the H5N1 virus to create a more contagious strain that's transmissible between ferrets, agreed to a temporary moratorium, due to safety concerns. The NewsHour reported the story here and here . [More]

Ernst Haeckel around Christmas 1860, when he was 26, the year after he returned from Italy. Ernst Haeckel had spent an unhappy year practicing medicine when his parents finally consented to pay for a year of scientific study and travel in Italy. It was 1859, and he was 25

Test your local water and share the results globally [More]

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Image: Illustration by John Hendrix The U.S. Food and Drug Administration today approved a new drug that tackles the underlying cause of cystic fibrosis (CF) in 4 percent of patients . The drug, called ivacaftor (brand name Kalydeco), acts by helping the body make better use of a protein that works incorrectly in cystic fibrosis patients.

PET image of Alzheimer's patient Government declarations of war on drugs or disease often end in losing battles. [More]

* March 11 Fukushima disaster triggered radiation crisis * But evacuations helped reduce any health impact [More]

CES 2012: Intel to Power Smart Phones, Create Ultrabook-Tablet Hybrid Devices [More]

For years New York City–based universities have been opening satellite campuses worldwide, whether it is New York University's sites in Abu Dhabi and Tel Aviv or Columbia University's Global Centers in Beijing and Nairobi. Technion–Israel Institute of Technology in Haifa is returning the favor in a big way, partnering with Ithaca, N.Y.–based Cornell University to build a campus on New York City's Roosevelt Island .