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How fast we lose teeth in old age has been linked to a person’s risk of dying in a comprehensive new study, emphasizing the importance of good oral health, and suggesting tooth loss could be a key indicator of other …

Some problems are too hard for even quantum computers Yaroslav Kushta/Getty Images Researchers have identified a “nightmare scenario” calculation related to exotic types of quantum matter that would be impossible to solve, even for a very efficient quantum computer. Without …