Taxonomy term

uranium

Uranium contamination in aquifers could be linked to nitrate

Nitrogen is an essential nutrient for plant life, but plants can only take up so much so fast. When excess nitrogen enters the environment by way of fertilizer and manure runoff, as well as in automobile and industrial emissions, it becomes a pollutant that can leach into waterways, carrying with it unintended — and often undesirable — consequences. In a new study, researchers have found evidence of one such consequence: elevated uranium levels in two major U.S. aquifers.

17 Feb 2016

Down to Earth With: Lee Allison

Lee Allison was head of the Arizona Geological Survey. EARTH interviewed him in 2012 and spoke with him about the latest issues in Arizona geology and the complicated politics of potash and uranium mining.

27 Jan 2012

Benchmarks: Henri Becquerel discovers radioactivity on February 26, 1896

February 26, 1896, was an overcast day in Paris — and that presented a problem for French physicist Antoine Henri Becquerel. Becquerel was hoping to demonstrate a link between minerals that glow when exposed to strong light and a new type of electromagnetic radiation called X-rays. The weather thwarted this experiment — but that failure inadvertently produced an entirely new discovery: natural radioactivity.

28 Feb 2011

Old plutonium reveals new secrets

Buried treasures come in many forms. Few, however, can help prevent the spread of nuclear weapons to terrorists. But a glass bottle discovered in an old safe buried at the Hanford Site in eastern Washington turned out to contain crucial clues that could help scientists develop new ways to track the spread of nuclear materials.

16 Jun 2009