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Renewable energy is taking off across the nation, but storing the energy is still a problem that is challenging companies to innovate, with solutions ranging from molten salt to ice.

Someone has been using Lego blocks to repair the corner of a crumbling brick building in Boston. Reporter Tovia Smith set out to investigate who this person is and what else he has been up to.

Barry Burden, director of the Elections Research Center at the University of Wisconsin-Madison, talks to Renee Montagne about which candidates students, unions, rural and urban voters support.

Ted Cruz is looking to upset Republican front-runner Donald Trump in Tuesday's Wisconsin primary. The stakes are getting higher as the number of contests left grows smaller.

Ted Cruz hopes support from Scott Walker and the state's influential talk radio contingent can help him topple Trump. Meanwhile, Bernie Sanders hopes the state's progressive bent bends for him.

Universities have changed significantly since the Middle Ages. James Axtell describes just how far higher education has come in his new book, Wisdom's Workshop.

Robert Hellenga's new collection contains nine searching, mature stories about grand passions, fleeting romantic adventures, and facing the end of life with few illusions.

Sen. Charles Schumer objects to a smartphone weapon. It's not an app for an iPhone — it's an acutal pistol that folds up to resemble an iPhonoe

This short video, making the rounds on social media, provides some eye opening insights into the distribution of human welfare, says Adam Frank.

Also: It's primary election day in Wisconsin; the Justice Department is investigating an Arizona county's botched election; and Syracuse faces UConn in the women's NCAA title basketball game tonight.