91色情片

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A view of a Meteor Shower and the Milky Way with a pine trees forest silhouette in the foreground. Night sky nature summer landscape. Perseid Meteor Shower observation.; Shutterstock ID 691039453; purchase_order: -; job: -; client: -; other: -

Space

Watch out for three meteor showers set to occur in October

A triptych of meteor showers will pepper the sky this month: the Draconids, the Orionids and the Taurids. Here is how and when to spot them, writes Abigail Beall

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Tom Gauld on the Grand Old Duke of York’s chief scientist

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Twisteddoodles on a scientist’s weaknesses

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Earth

Striking photos show scale of development in sub-Saharan Africa

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2GPFM5E Child in green jacket looking at rainbow over an ocean

Why do I see extra colours bands below the typical bow of a rainbow?

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Impressed young asian woman talking on phone with girlfriend while putting mascara in front of mirror at home, sharing rumors; Shutterstock ID 1793035801; purchase_order: -; job: -; client: -; other: -

Why do we open our mouths when we put on mascara?

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Portrait of white cat with crown on head sitting on bed, Namibia.

This week鈥檚 new questions

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Humans

How to cook the perfect corn on the cob

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Do men and women prefer different nose-based gestures?

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Tom Gauld on a mathematician in jail

Tom Gauld's weekly cartoon

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Twisteddoodles on missing electrons

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Physics

Show children how to make a simple electric motor with a magnet

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Could a word on ball of string be deciphered if the ball unravelled?

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Is jet lag worse if you travel east rather than west?

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