Nell Greenfieldboyce
Stories
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When sea otters lose their favorite foods, they can use tools to go after new ones
Some otters rely on tools to bust open hard-shelled prey items like snails, and a new study suggests this tool use is helping them to survive as their favorite, easier-to-eat foods disappear.
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National
Good news from Voyager 1, which is now out past the edge of the solar system
In mid-November, Voyager 1 suffered a glitch, and it's messages stopped making sense. But the NASA probe is once again sending messages to Earth that make sense.
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National
Millions of Americans witnessed today's solar eclipse
In the wake of the total solar eclipse, many Americans experienced it in different ways. Here are the highlights.
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Worried about eclipse damage to your eyes? Don't panic
Eye damage is rare and sometimes temporary, but it never hurts to get it checked.
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National
These kids saw the last total solar eclipse in the U.S. This is how it changed them
Several kids have gotten not one but two opportunities to see total solar eclipses while growing up. We asked some of them what they remember of the last one, and how it changed them.
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NASA's Voyager 1 spacecraft is talking nonsense. Its friends on Earth are worried
Voyager 1 has been traveling through space since 1977, and some scientists hoped it could keep sending back science data for 50 years. But a serious glitch has put that milestone in jeopardy.
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National
The aging Voyager 1 spacecraft has a serious glitch, and NASA is pondering risky fixes
The Voyager 1 probe, the first human-made object to reach the space between stars, has suffered a serious problem that NASA experts are struggling to understand and repair.
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Why do moths fly in circles around a light? They can't tell 'up' from 'down'
Those insects you see flying in crazed circles are trying to keep their backs towards the light because they think that direction is up, new research suggests.
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Don't look so blue, Neptune: Now astronomers know this planet's true color
Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of light greenish blue.
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Just how big can a snowflake get? It depends on what you mean by 'snowflake'
The Guinness World Record folks would have us believe in a 19th century snowflake more than a foot wide, but some scientists are skeptical.