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Gold ore mined in northern Nigeria is mixed with lead. When the ore is dug up, crushed and processed, the lead escapes into the air and settles on the ground. Children are being poisoned when they swallow lead-contaminated dust and dirt.

From pirates to tea to opium, Eric Jay Dolin's new book, When America First Met China, describes the long and complicated history of the trade relationship between the two countries.

Top universities are embracing free online education. Dozens of schools, such as the University of Pennsylvania, are now offering classes to thousands of people across the world. But what will this mean for the future of the classroom, and the brand of the universities involved?

The next version of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders proposes to lump nail biters and other pathological groomers with people who have obsessive compulsive disorder. But some psychiatrists see nail biting as a much more benign habit.

About 80 percent of Americans will see their tax bills rise if the Bush-era tax cuts are allowed to expire at the end of this year. But those who will take the largest hit are those with the highest incomes.

Decisions are expected this term on affirmative action in higher education, same-sex marriage, the Voting Rights Act and a lot of privacy issues. The court opens the term Monday by taking a look at a case brought against Shell Oil by 12 Nigerians granted political asylum in the U.S.

New York regulators expect to reopen their rulemaking process for shale gas drilling using hydraulic fracturing, shedding doubt on whether a 4-year-old…

Biomedical researchers believed that most retractions of published studies were the result of honest errors. An analysis of retractions over four decades finds that's not the case.

Both President Obama and Republican Mitt Romney agree: America's tax system is too complicated. Both men have outlined changes that are broadly similar, although they have some important differences. But both candidates run for cover when asked about the tax breaks they want to eliminate.

As political ads ramp up on TV, a newer platform is also seeing a spike in political messages. In 2008, Barack Obama became the first presidential candidate to use political advertising in a video game. This year, the Romney campaign says it is also injecting politics into gaming.