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Answer by Professor

Professor Chris Smith, of Manchester Met University

What came first, the chicken or the egg?
The egg as a method of reproduction evolved before the chicken – for example, dinosaur eggs.
Thus, the first chicken would have hatched from an egg laid by a “chicken ancestor”. So the egg came first.

Why does hair turn grey?
Hair colour is the result of pigment secretion which gradually fails as the person ages.
Hair is naturally without pigment, so apparently grey. The time when the greying occurs is genetically controlled.

Why does it always rain in England?
The UK sits in the mid-latitudes, where cold air from the poles meets warm air from the tropics, and has the Atlantic on one side and the large landmass of continental Europe on the other, causing weather that is highly variable.

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