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An image believed to be that of a hole-punch cloud. Scientists say airplanes create these patterns when they fly through certain types of clouds. The water in the clouds can turn to rain or snow and fall to the ground. H. Raab/Vesta/Wikimedia Commons hide caption

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H. Raab/Vesta/Wikimedia Commons

Snow Delay At The Airport? Blame Planes And Clouds

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Dr. Ray Dorsey video chats with his patient, Victor Jarzombeck, from his office at Johns Hopkins Medical Center in Baltimore. Dorsey has been treating Jarzombeck, who lives nearly 350 miles away in New Hartford, N.Y., for three years. Maggie Starbard/NPR hide caption

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Maggie Starbard/NPR

The Parkinson's Doctor Will Video Chat With You Now

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Dr. Mark Lachs says his older patients are like reliable cars. After a certain age, they are less likely to break down, and just keep rolling right along. Adrian Kinloch hide caption

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Adrian Kinloch

In Old Age, Illness And Dying Can Be Postponed

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