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Oil from the damaged Deepwater Horizon oil well lingered off the Mississippi Delta on July 4, 2010. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra captured this natural-color image the same day. The oil appears as an uneven light gray shape east-southeast of the Mississippi Delta. The oil was visible to MODIS on July 4 thanks to sunglint. Oil smoothes the surface of the water, making it a better mirror of sunlight. As a result, close to the Sun’s reflection, the oil is brighter than surrounding water. This is especially true between the Mississippi Delta and the Deepwater Horizon location. East of the rig, however, sunglint lightens most of the water, making it more difficult to distinguish oil from oil-free water.

Scientists from the University of South Florida announced on Friday that they have "definitively connected" the underwater oil plumes to BP's ruptured and still slightly leaking well in the Gulf. Read more»

A ship floats among a sea of spilled oil in the Gulf of Mexico after the BP Deepwater Horizon oil spill disaster.

The administration’s raging against BP is not going to get the oil to stop flowing or get it cleaned up any faster. It is rank populism for political purposes and is not something the president of the United States, or Congress, should provoke. Read more»

Oil cleanup workers on offshore vessels will begin receiving longer and more thorough safety trainings Tuesday, fulfilling a pledge by OSHA to improve training after it acknowledged that the previous course was inadequate. Read more»

New data from BP shows that payments have been made on only 28 percent of claims for damages from the Gulf oil spill, while the company has determined that more than half lack enough information to be approved. Read more»

Thousands of miles from the Gulf of Mexico, the site of BP's massive oil leak, Egypt is struggling with own oil spill. Now, just like most Americans, Egyptians are asking what went wrong in the Red Sea. Read more»

Hurricane damage, Monterrey, Mexico.

As the waters unleashed by Hurricane Alex and Tropical Storm Bonnie finally receded this week, Mexican officials have begun to measure the scale of the damage. The destruction, they concluded, will set the local economy back by years. Read more»

Tired of waiting for the monsoon? Keep your hopes up, but don't bet on a rainy summer. Already dry conditions across parts of Arizona and New Mexico are likely to worsen in coming months, said the National Weather Service. Read more»

The flowers of the 'Queen of the Night' stand out against the background of volunteers and staff who offered information about the plant.

The night-blooming cereus is a remarkable sight - one revered by those who live in the desert because the bloom is rarely seen. The "Queen of the Night" only flowers on a single night per year. Read more»

The long slow onset of the monsoon has delayed one of Tucson's grandest sights: the flowering of the night-blooming cereus. Friday night, the flower is finally set to show its once-a-year beauty. Read more»

Watching the clouds build up around the Rincon and Catalina mountains, Tucsonans spend early July wondering where and when the summer rains will finally fall. Track the rain's progress with the UA's new website, Monsoon Monitor. Read more»

Two weeks before the blowout in the Gulf of Mexico, the huge, trouble-plagued BP refinery in Texas City, Tex., spewed tens of thousands of pounds of toxic chemicals into the skies. The release began April 6 and lasted 40 days. Read more»

An oil rig in Midland, Tex.

Three weeks ago, the Senate rejected a proposal to eliminate about $35 billion in tax subsidies to oil companies as millions of gallons of oil spewed into the Gulf of Mexico. Read more»

The world's first osmotic power prototype is situated at Tofte, one hour south of Oslo in Norway.

When Norwegian researchers started the hunt for new and revolutionary power sources more than a decade ago, they turned to their country's 155,000 miles of coastline. In 2009, Crown Princess Mette-Marit inaugurated the world's first seawater power plant. Read more»

Those of us who live in Arizona know that if there's one resource we have in abundance, it is sunlight Given this plentiful resource, it only seems natural that we should harness its energy to power our homes, schools and businesses. Read more»

Workers clean the beach at Gulf Shores, Ala.

Medical researchers are this week meeting in New Orleans to discuss how the major oil spill in the Gulf of Mexico will affect human health. Read more»

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