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The Transportation Security Administration (TSA) is looking to monitor the levels of radiation that its employees are exposed to from X-ray technology, including airport body scanners, a document from the agency says.

NASA’s plans for human spaceflight, the subject of much hand-wringing since the curtains closed on the agency’s space shuttle program in July, took a big step this week when the agency announced plans for a powerful new rocket to take astronauts into deep space. [More]

The U.S. Environmental Protection Agency has dropped the artificial sweetener saccharin from its list of hazardous substances, the agency said on Tuesday.