Don Mason/Getty Images
What determines fingerprints? Is it a random process or is it something inherited from our parents?
Manyando Milupi, Muscat, Oman
Shutterstock/Alex Desanshe
Aiming a hosepipe, intuition told me a 45-degree angle would maximise the distance travelled by the water, as it would for a projectile. But when I did this, the water actually went a shorter distance. Why?
Robert Morley, London, UK
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