Elena Renken
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Some animals live longer than they should for their size. Some have shorter lives. And others don't appear to age at all.
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A key adviser to the president, Dr. Anthony Fauci doesn't think every state needs to be on lockdown just yet. But some places should be preparing for surges like New York's.
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Years before he got diagnosed with Parkinson's, Joy Milne noticed her husband's characteristic scent had changed. The discovery that she could smell his illness has opened up a new field of research.
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In her new book, Lydia Denworth makes the case for the vital necessity of friendship, tracing its effects on your genes, on your brain and even on animals like sheep and fish.
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A photojournalist in Wuhan, China, portrays a city under quarantine in the midst of COVID-19.