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Last week, the Nuclear Regulatory Commission held a federal hearing to address cracks in the concrete at Seabrook Station Nuclear Power Plant. The safety…

SpaceX's Dragon capsule has travelled safely to the International Space Station and back. The next step, says Space.com writer Clara Moskowitz, is to outfit the capsule for crew, which SpaceX hopes to complete by 2015. Until then US astronauts will hitch rides on Russia's Soyuz, at about $60 million a pop.

At a day of remembrance, Missouri Gov. Jay Nixon honored emergency workers, victims and survivors of tornadoes that killed 161 people, and praised the ongoing efforts to rebuild Joplin. Reporter Matt Pearce, who was in Joplin the morning after the tornado, talks about the aftermath of the disaster.

In his book Grand Central: How A Train Station Transformed America, New York Times urban affairs correspondent Sam Roberts writes of the scientific innovations pioneered at New York City's Grand Central Terminal, such as electric commuter trains and standardized time.

It's been four days since Superstorm Sandy battered the Northeast U.S., flooding towns and coastlines and knocking out power to millions. Concern is growing for the elderly and the physically disabled, many of whom remain isolated in cold, dark homes without assistance, food and running water.

A road trip I took with Energy Secretary Jennifer Granholm confirmed one thing: The U.S. is wrestling with an inadequate charging network (unless you're a Tesla driver).

A massive project headed by Elon Musk in Memphis, Tenn., to power AI has moved at breakneck speed. But it's stirring controversy around pollution emissions. The EPA says it's looking into it.

The Supreme Court will begin hearing arguments on Wednesday on the relevance and constitutionality of the 1965 Voting Rights Act. The court is tasked with determining whether states with a history of discrimination still need to get federal approval before changing election procedures.

On May Day, the Occupy Wall Street movement re-emerged to try to reestablish its message and place in the national conversation. Thousands marched in New York City, Oakland and other cities, then quickly faded from national view. Guests consider what sustains social movements, and why some fail.

The natural world quiets down in December, both visually and audibly. Fall's riot of colors is long gone, and the bird song chorus is a distant memory.…