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  1. Space

    Planets with many neighbors may be the best places to look for life

    Solar systems with many planets in circular orbits suggest a calm life-nurturing past, while single exoplanets with eccentric orbits hint at chaos.

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  2. Genetics

    A key to the mystery of fast-evolving genes was found in ‘junk DNA’

    A new study challenges a long-held belief that essential genes change little over time.

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  3. Readers ask about buoyancy, Stonehenge sounds and more

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  4. With a pandemic, impatience can be deadly

    Editor in chief Nancy Shute writes about pandemic fatigue and the importance of patience in the face of uncertainty.