Cover image for Why is space so dark even though the universe is filled with st…
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Cover image for How do astronomers know the age of the planets and stars?
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Cover image for Lab-grown ‘ghost hearts’ work to solve organ transplant shortag…
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Cover image for Why does a plane look and feel like it’s moving more slowly tha…
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Cover image for A sculptor of wind explains how to make fiber dance far above c…
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