51动漫

Last Word

Mysterious alignment: How do ancient monoliths still line up with the sun?

How can ancient monoliths that were aligned with the sun at the equinox thousands of years ago still be lined up, given that plate tectonics moves land masses over the years?

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How small does an animal have to be to have small fleas?

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A kettle boiling

This week鈥檚 new questions

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Dusty rain: Why does rain leave a residue behind and where does it come from?

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ACHOO: Why do some people sneeze so many times?

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This week鈥檚 new questions

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river crossing

Level crossing: Why is it hard to walk if there’s a large drop nearby?

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Cycling

Running while cycling: Why does my nose run when I’m on my bike?

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This week鈥檚 new questions

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music notes coming from head

Let it go: How does an earworm get in and how do you get it out?

Why do tunes sometimes stick in our heads for days on end, and more importantly, how do you banish them? Useful insights from many readers

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Broadly speaking: How do we know the universe is expanding?

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This week鈥檚 new questions

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Lend a hand: Is there an advantage to being left or right-handed?

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Aural enhancement: Do people with bigger ears have better hearing?

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