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The drive to make more milk has had an unsavory side effect: Cows have become more genetically similar and less fertile. Scientists are trying to recover valuable genetic variation that was lost.

The Iowa State Fair can be a lot of fun, but for presidential candidates it's serious business. California Sen. Kamala Harris came to the fair intent on proving she's a top-tier contender.

The dynasty of Daley politicians in Chicago appears to be ending — the city's two top mayoral candidates are African-American women. The women will compete in a runoff election next month.

School closings and high crime in some neighborhoods are big issues as Rahm Emanuel battles four challengers who want his job. President Obama is headed to town to give his former top aide a boost.

Trump has spent a tiny fraction of what Jeb Bush has spent on TV ads, but the former reality TV star remains unshakably at the top of national polls.

Childhood malnutrition and unsafe water are no longer in the top 10 of risks for death. But lifestyle-related risks, from smoking to diets high in salt and low in fruits, are killing millions.

The weekend's NCAA men's college basketball tournament saw some close games. Top seeds Gonzaga and Georgetown lost. Florida Gulf Coast University became the first 15th seed to win two games in tournament history.

When businesses have accused Google of antitrust violations in the past, they've often focused on its key asset: search. We look at the complaints, and Google's response.

A big part of Donald Trump's proposed tax cut would go to corporations. The president-elect says that will fuel investment and growth; critics say the plan would explode the federal budget deficit.

Sinners landed a record number of nods, while Avatar: Fire and Ash and Wicked: For Good fell short of their franchise predecessors.