The Müller-Lyer illusion makes lines of equal length appear different.
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In 1996, Dolly the sheep became the first cloned mammal from an adult cell.
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The Asch conformity experiment revealed how group pressure influences decisions.
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The axolotl can regenerate limbs and even parts of its heart.
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The first birds evolved from small theropod dinosaurs.
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The smallpox vaccine led to the global eradication of smallpox.
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The barometer measures atmospheric pressure.
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The invention of the stethoscope improved medical diagnostics.
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Water expands when it freezes, which is why ice floats.
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