The holidays are all about generousity, gratitude, and spending time with the people we love. But we all know the whole "spending time with the people we love" part has its challenges. Hidden Brain is here to help. iStock hide caption

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Brain imaging experiments found patterns associated with attention span. iStockphoto hide caption

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A biologist holds a slide prepared for testing in a micro array for biological hazards at the Lawrence Livermore National Laboratory in Livermore, Calif. Ben Margot/AP hide caption

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Bryan Bashin, CEO of the LightHouse for the Blind and Visually Impaired, in San Francisco, started losing his sight in his teens. "Don't just hide," he advises others. "This is not some kind of deep loss. This is just another side of being human." Jeremy Raff/KQED hide caption

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Reporter Christopher McDougall explains why humans are born to run. Courtesy of TED hide caption

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Daniel Kish speaks at TED in 2015. Bret Hartman/Courtesy of TED hide caption

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TED Radio Hour

Daniel Kish: How Can You See Without Seeing?

Daniel Kish has been blind since he was 13 months old, but has learned to "see" using a form of echolocation.

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AquaBounty's salmon (rear) have been genetically modified to grow to market size in about half the time as a normal salmon — 16 to 18 months, rather than three years. MCT /Landov hide caption

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A 2011 photo provided by J. Scott McMurray, a professor at the University of Wisconsin School of Medicine and Public Health, shows a normal larynx and vocal folds during surgery in Madison, Wis. Now researchers have grown human vocal cords in the laboratory. J. Scott McMurray/AP hide caption

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In this Aug. 2014 photo, a chimp sits in a tree at Chimp Haven sanctuary in Keithville, La. Brandon Wade/AP Images for The Humane Society of the United States and Chimp hide caption

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