快猫短视频

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Trip to the moon (lunar) concept - Long exposure night time rocket launch with solar eclipse "Elements of this image furnished by NASA" ; Shutterstock ID 1937796442; purchase_order: -; job: -; client: -; other: -

What happens if I shine a torch when moving at the speed of light?

I am at the rear wall of my spaceship travelling at the speed of light. I switch on my flashlight. Will the light reach the front wall? Our readers debate the possibilities and impossibilities of this scenario

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Mandatory Credit: Photo by Ryan Browne/Shutterstock (13048564cx) Eilish McColgan of Scotland celebrates victory in the Women's 10,000m final Commonwealth Games 2022, Day Seven, Birmingham, UK - 3 Aug 2022

Can the drag of hair tied in a pony tail slow down elite runners?

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This week鈥檚 new questions

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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

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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

What has been the most successful animal ever? And why does pressing our fingers together in water increase the resistance in water, when the total surface area is the same?

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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

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Twisteddoodles on missing electrons

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