arsenic

The Best of Our Knowledge explores topics on learning, education, and research.Arsenic is a naturally-occurring toxin with a big reputation.But scientists say arsenic-contaminated waste could have a potential public benefit, including in advanced manufacturing. We’ll explore how an environmental challenge could become an economic opportunity.

"The Angel Makers" is a true-crime story like no other. In the book, by Patti McCracken, a 1920s midwife who may have been the century’s most prolific killer leading a murder ring of women responsible for the deaths of at least 160 men.

The U.S. Environmental Protection Agency has come up with a solution to protect residents at a Superfund site in Putnam County, New York.The EPA says its…