91色情片

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Do we perceive colours around us differently to others?

Some see the shoe (pictured) as grey and green, but others perceive it to be pink and white. Is this due to differences in our brains, and if so, do we each perceive different versions of the colours that surround us?

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This week鈥檚 new questions

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Mathematicians finally discover when your elevator will arrive

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Space

Jupiter Saturn conjunction: How to see tonight’s ‘Christmas star’

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Christmas crafts: How to make your own amazing optical illusion

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Twisteddoodles finds a reindeer with a red nose genetic mutation

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Feedback’s comedy award ceremony: The strange year that was 2020

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Life

Image of fairy penguins watching Melbourne lights wins photo prize

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Humans

Learn to love those Christmas sprouts with simple cooking science

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Tom Gauld: Rudolph the reindeer in 4 graphs

Tom Gauld's weekly cartoon

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Twisteddoodles produces a lab accident form

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Are these the strangest Amazon book recommendations of all time?

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Has the doubling of the human population increased Earth鈥檚 mass?

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What makes some people short-sighted and others long-sighted? (cont.)

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