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Topic: arsenic

12th President Zachary Taylor (Heritage Art/Heritage Images via Getty Images)

The presidential murder mystery of 1850

Matthew Rozsa
The famed "Tufa" formations of Mono Lake, near Lee Vining, CA, will slowly be re-submerged into the briny water where they were formed by an underwater chemical reaction between submerged freshwater springs and salty lake water June 22, 2000. The fragile limestone formations became exposed to the air as a result of the diverting of five inflowing streams to quench the thirst of the city of Los Angeles, 350 miles to the south, since 1941. Two decades of environmental activism to restore the water level and save the threatened ecosystem of one of the oldest lakes in North America, more than 760,000 years old, resulted in the implementation of a stream restoration plan in 1998 which will ultimately return the lake level to within 25 feet of its 1941 elevation. (David McNew/Newsmakers)

For some nematodes, sex is a trinary

Nicole Karlis
(<a href="http://en.wikipedia.org/wiki/File:Mondaufgang_im_Valle_de_la_Luna.jpg">HolyPetrus</a>)

Evolving to live with arsenic poisoning

Darcy Shapiro - Massive Science
In this Thursday, Jan. 14, 2016, photo, a worker walks across an area where coal ash removal is underway at the Dan River Steam Station in Eden, N.C. Duke Energy Corp. is digging up and hauling away the toxic coal residues two years after one of the worst coal-ash spills in U.S. history. (AP Photo/Gerry Broome) (AP)

Coal ash contains toxic chemicals

Laura Mast
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Lindsay Abrams
(schankz/Shutterstock)

Lindsay Abrams

Martha Rosenberg - Alternet
(Wikimedia Commons)

Lindsay Abrams
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(U.S. Geological Survey)

Lindsay Abrams
(AP/Donna Mcwilliam)

Theodoric Meyer - ProPublica
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