Letters to the Editor

Animals

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Readers respond to jellyfish, goalkeeping and off-kilter planets.

Planetary Science

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Readers discuss sources of stress in everyday life and tell us what they think about NASA's plan to nab an asteroid.

Earth

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Readers discuss Tibetan genetics, how Saharan dust built the Bahamas and why people don't like being left alone with their thoughts.

Life

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Readers discuss Dulles' microscapes exhibit, baby birthweights and what should be done about the triclosan problem.

Psychology

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Readers way in on slacktivism, cockroaches, dinosaur tracks and more.