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Most won’t sweat income tax deadline, poll finds

WASHINGTON, D.C. — One in four Americans waited until the end of tax season to file their returns and a majority think they pay about the right amount in federal taxes, according to a new McClatchy-Marist Poll released Monday, a day before the tax deadline.

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RoboClam: Robot inspired by the razor clam’s amazing digging powers

LOS ANGELES — Warning: Don’t try and stick this clam in your chowder. Scientists have built a robotic clam that isn’t edible but could be incredibly useful, because it easily outperforms other commercial digging devices. This RoboClam, described at the American Physical Society meeting in Denver, could prove invaluable as low-energy anchors or as an environmentally safe way to lay down more intercontinental, undersea fiber-optic cables.

RadioShack will close 1,100 stores as sales slump

Shares of RadioShack, the electronics retailer trying to shake its reputation as a relic, tumbled the most in more than four months after the company reported disappointing sales and announced plans to close about a fifth of its stores.