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Tuesday, July 17, 2018

Helping dam north of Grand Canyon balance environment, hydropower needs

Researchers have helped develop a plan for the operation of Glen Canyon Dam in Glen Canyon National Recreation Area, upstream of Grand Canyon National Park. The plan, known as the Glen Canyon Dam Long-Term Experimental and Management Plan, and documented in a final environmental impact statement, recommends a strategy that would balance hydropower with the protection of environmental, cultural and recreational resources in the area.

New research on bats hunting in noise

Noise pollution, according to a new study, has been linked to lower survival and reproduction because it masks environmental cues and makes it hard for animals to hear moving prey or approaching predators.

Colorado River’s dead clams tell tales of carbon emission

Scientists have begun to account for the topsy-turvy carbon cycle of the Colorado River delta – once a massive green estuary of grassland, marshes and cottonwood, now desiccated dead land.

Underfed worms program their babies to cope with famine

Going hungry at an early age can cause lifelong health problems. But the extent of malnutrition's damage depends on mom's diet too -- at least in worms. A new study of the tiny nematode worm C. elegans finds that young worms that don't get anything to eat in the first few days of life are buffered from early starvation's worst effects if their mothers had also been underfed.

Early Pacific seafarers likely latched onto El Nino, other climate patterns

Researchers employed computer simulations and climatic data to help them explore the travels that led to the settlement of islands in Remote Oceania.

Conundrum of missing iron in oxygen minimum zones solved

Iron is an essential nutrient for biological productivity in the oceans. However, dissolved iron quickly combines with oxygen and is then no longer usable by organisms. For a long time it has been a conundrum why even in low oxygen zones of the Tropics the dissolved iron concentrations are relatively low. An international research has now discovered that in anoxic seawater, iron is removed through reaction with nitrate instead of oxygen.

New biochar model scrubs carbon dioxide from the atmosphere

An economically viable model to scrub carbon dioxide from the atmosphere has been developed to thwart runaway, point-of-no-return global warming. The researchers propose using a “bioenergy-biochar system” that removes carbon dioxide from the atmosphere in an environmental pinch, until other removal methods become economically feasible and in regions where other methods are impractical.

Exploring the evolution of spider venom to improve human health

More than 46,000 species of spiders creepy crawl across the globe. Each one produces a venom composed of an average of 500 distinct toxins, putting the conservative estimate of unique venom compounds at more than 22 million. Researchers are studying these toxins to increase our understanding of the evolution of spider venom and contribute to the development of new medicines, anti-venoms and research tools.

Microplastics in agricultural soils: A reason to worry?

Microplastics are increasingly seen as an environmental problem of global proportions. While the focus to date has been on microplastics in the ocean and their effects on marine life, microplastics in soils have largely been overlooked. Researchers are concerned about the lack of knowledge regarding potential consequences of microplastics in agricultural landscapes from application of sewage sludge.

How sharks recycle toxic ammonia to keep their skin moist

The Pacific spiny dogfish shark is a master at recycling the ocean’s toxic ammonia and converting it into useful urea, according to new research.

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U.K.’s pro-Brexit campaign broke election laws

Vote Leave group dismisses national Electoral Commission's report as "wholly inaccurate" and politically motivated

Ex-CIA deputy director: Senior intelligence officials should consider resigning

CBS News senior national security contributor Michael Morell served as CIA deputy director and acting director. He says the president’s comments in Helsinki have dealt a major blow to the relationship between the president and the intelligence community. He joins “CBS This Morning” from Jackson Hole, Wyoming, to discuss.

Officials doing damage control after Trump’s election meddling comments

Administration officials want the president to make clear he believes his own intelligence sources over Russian president Vladimir Putin