Khartoum Journal: As Floods Ravage Sudan, Young Volunteers Revive a Tradition of Aid

Reuters Men built a barrier to protect their houses from rising water in Khartoum, Sudan, this week. More than 300,000 people have been directly affected by the flooding, and dozens have died. KHARTOUM, Sudan — Their temporary headquarters are...

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What We Eat: Building a Better Mass-Market Tomato

David Manning for The New York Times Heirloom tomatoes grow in a greenhouse at the University of Florida.  GAINESVILLE, Fla. — Science is trying to build a better supermarket tomato. At a laboratory here at the University of Florida's Institute...

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Bruce C. Murray, Who Helped Earth Learn of Mars, Dies at 81

Bruce C. Murray, a planetary geologist who won his spurs interpreting findings of early missions to Mars and who led NASA's Jet Propulsion Laboratory through a time of flagging support for new flights in the late 1970s, died Thursday at his home in...

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Cave Collector in Minnesota Hunts for Additions to His Empire

RACINE, Minn. — John Ackerman has been called a tree hugger and a kook by two landowners and a devil worshiper by a local town board member. He has been accused of land snatching and gold prospecting. Others see him as an explorer and a fierce protector...

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Canadian Documents Suggest Shift on Pipeline

OTTAWA — Ever since President Obama said in June that a litmus test for the proposed Keystone XL oil pipeline from Canada was whether it would "significantly" worsen global warming, Canadian government officials have insisted it would not. They...

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A Blazing Giant Stirs California to High Alert

Jae C. Hong/Associated Press Inmate firefighters hiked amid glowing forest on Highway 120 on Sunday as the Rim Fire burned along the northwest edge of Yosemite National Park. YOSEMITE NATIONAL PARK, Calif. — A wildfire near Yosemite National Park...

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Dot Earth Blog: From the Fire Hose: Obama’s Bus Stop in Gas Country, Al Gore’s ‘Category 6,’ an Unplugging Climate Blogger

Updated, 12:23 p.m. | Here's another end-of-the-week roundup of noteworthy news and analysis on issues relevant to Dot Earth grabbed from the 24/7 fire-hose flow: Fracking | Bryan R. Walsh of Time Magazine has beautifully summarized energy issues that...

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Gray Matter: Does Media Violence Lead to the Real Thing?

EARLIER this summer the actor Jim Carrey, a star of the new superhero movie "Kick-Ass 2," tweeted that he was distancing himself from the film because, in the wake of the Sandy Hook massacre, "in all good conscience I cannot support" the movie's extensive...

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Nuclear Operator Raises Alarm on Crisis

TOKYO — The operator of Japan's tsunami-hit nuclear power plant sounded the alarm on the gravity of the deepening crisis of containment at the coastal site on Friday, saying that there are more than 200,000 tons of radioactive water in makeshift tanks...

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About New York: With Ships, Silt and a Giant Straw, a Beach in the Rockaways Is Reborn

Somewhere among the chutes and spider-web rigging and pivoting water guns was the younger faction of Chaya Genack's six children. Just as Ms. Genack was itemizing the playground's importance in her life — "It's so gorgeous, we could be here all day"...

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The Week: Progress in Quest for a Reusable Rocket, and Teleporting Data

By SpaceX SpaceX The SpaceX Grasshopper: On Aug. 13, the Falcon 9 test rig, also known as Grasshopper, completed a successful lateral fight maneuver. Our theme this week is things that move in unexpected ways. In Texas, a rocket flew 800 feet...

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C. Gordon Fullerton, Early Space Shuttle Pilot, Dies at 76

Col. C. Gordon Fullerton, an astronaut who performed the first flight test of a space shuttle in 1977, then piloted two shuttle missions — including one in which an engine failed shortly after takeoff — died on Wednesday in Lancaster, Calif. He was...

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Green Column: Wind Farms Take Root Out at Sea

BREMEN, Germany — In a warehouse district on the outskirts of Bremen in northwestern Germany is a big, well-lighted work space dominated by the massive top section of a wind turbine called a nacelle. It is here that Siemens, the German power systems...

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An Effort to Expand Access to a Drug That Could Save Victims of Overdoses

Ms. Dittmeier, 23, died of a heroin overdose in January, leaving behind her 3-year-old son, Aiden. Ms. Allar is haunted, she said, not just by her daughter's tumble into addiction, but also by the circumstances of her death. She wonders if her life might...

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Mystery Virus That’s Killed 47 Is Tied to Bats in Saudi Arabia

Jonathan H. Epstein/EcoHealth Alliance A match to the virus was found in a fecal sample of this type of bat, the Taphozous perforatus. WASHINGTON — Health officials confirmed Wednesday that bats in Saudi Arabia were the source of the mysterious...

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Europe Set to Impose Sanctions on Faroe Islands Over Herring

Jonathan Nackstrand/Agence France-Presse — Getty Images A fishing boat in the Faroe Islands. The tiny territory's economy rests heavily on exports of herring and mackerel. PARIS — The European Commission said on Tuesday that it was enacting tough...

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Urgent Task for Insect: Stop a Relentless Vine

The beetles, each roughly the size of a sesame seed, are part of a broad strategy to combat the relentless mile-a-minute vine, which has invaded parks and forests from North Carolina to Massachusetts and as far west as Ohio. Known scientifically as...

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