"A viable, effective vaccine against malaria has long eluded scientists. Results from a preliminary study have ignited hope that a new type of vaccine could change that. The experimental vaccine offered strong protection against malaria when given at high doses, scientists Thursday in the journal Science."

The study was extremely small and short-term. And the candidate vaccine still has a long way to go before it could be used in the developing world.

"In April, the U.S. Centers for Disease Control and Prevention raised to 535,000 its estimate of the number of American children with potentially dangerous levels of lead in their blood."

"MELBOURNE, Fla. — The first hint that something was amiss here, in the shallow lagoons and brackish streams that buffer inland Florida from the Atlantic’s salt water, came last summer in the Banana River, just south of Kennedy Space Center. Three manatees — the languid, plant-munching, over-upholstered mammals known as sea cows — died suddenly and inexplicably, one after another, in a spot where deaths were rare."

"The Environmental Protection Agency is proposing to let oil companies continue to dump polluted wastewater on the Wind River Reservation in Wyoming. This includes chemicals that companies add to the wells during hydraulic fracturing, an engineering practice that makes wells produce more oil."

"NEW YORK -- All of the notices U.S. regulators received to vouch for the safety of common food additives between 1997 and 2012 were submitted by people who had a vested interest in the outcome of those assessments, according to a study published in JAMA Internal Medicine on Wednesday."

"Key assumptions about bisphenol A (BPA) exposure and bioavailability may be off base, according to a new report in EHP that questions the traditional interpretation of biomonitoring data underlying current risk assessments of the chemical. Laboratory research suggests that BPA, a widely used chemical for polycarbonate plastics and other products, is an endocrine disruptor with potential adverse health effects involving reproduction, metabolism, and cancer."

"Stunning footage of dust coming from Detroit-side stockpiles of the heavy crude byproduct deepens environmental concerns."

"WASHINGTON -- A proposed overhaul of how the country regulates toxic chemicals came under sharp attack [Wednesday] from officials of California and several other states."

"The Carson City (Calif.) Council declared a local emergency Monday night over contamination in the city’s Carousel tract, upping the pressure on Shell Oil to expedite cleanup of benzene, methane gas, and other hazardous chemicals on the site."

"An appeals court on Tuesday unanimously upheld a decision striking down New York City’s restrictions on the sale of large, sugary drinks, dealing a serious blow to Mayor Michael R. Bloomberg’s hopes of reviving the rule before his term runs out."