Mars rover Opportunity helped usher in new generation of explorers
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A historic Mars expedition is officially over after a record-breaking mission, but its efforts might help with any human trip to the Red Planet. NASA lost contact with the rover Opportunity eight months ago. On Wednesday the space agency declared it dead due to a giant dust storm. Mark Strassmann reports.
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Developing app hopes to detect contaminated food and drinks
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Scientists at the Massachusetts Institute of Technology are using artificial intelligence to create a system that will allow people to test foods and drinks for contamination. Every year, an estimated one in six Americans gets sick from contaminated food, and 3,000 people die. Nikki Battiste gets a behind-the-scenes look at how the new technology will work.
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