Meet Chris Nikic, the first person with Down syndrome to conquer an Ironman triathlon, one of the world's toughest athletic competitions.

Thirty years ago, U.S. lawmakers passed a key law protecting people who have disabilities from discrimination.
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As the U.S. expanded west into Native American lands, a young Paiute girl became a champion for her people.
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Why is the Marine Corps the only branch of the U.S. military that trains male and female recruits separately?
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A unique political and economic partnership encourages peace and stability across the continent of Europe.
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Should treasure hunters who find shipwrecks be allowed to keep what they find? Or should it go to museums?
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In honor of Women’s History Month, get inspired by words of wisdom from some noteworthy women.

Researchers find evidence suggesting that some hunters in prehistoric times were female.
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A new study shows that kangaroos can communicate with humans—including asking for help.
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This year marks the 50th anniversary of the 26th Amendment, which lowered the U.S. voting age from 21 to 18.
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A new animatronic robot with a humanlike gaze is programmed to respond to humans in lifelike ways.
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An engineer describes a mission to land on and study an asteroid 200 million miles from Earth.
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