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Asteroi?d impact. The doomsday and extinction scene. Meteor hits the planet at high speed. ; Shutterstock ID 2645714679; purchase_order: -; job: -; client: -; other: -

Could a massive asteroid that hit Mars or the moon affect Earth?

We鈥檇 certainly know about it if an asteroid hit Mars or the moon, but just how much Earth would be affected depends on a number of factors

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2XHMJ3E Mixed breed dog running through grass with large stick in mouth

Why do dogs bring back a stick if you throw it? Part 2

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Sao Paulo, Brazil - November 26, 2015: Intense traffic in the Consolacao avenue, Sao Paulo, Brazil. It shows the dynamics of the traffic in that busy spot.; Shutterstock ID 347285747; purchase_order: -; job: -; client: -; other:

This week鈥檚 new questions

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3D illustration of A space station flies through the vastness of space. Spacecraft, spaceship design. High quality digital space sci-fi art in 5K - realistic visualization. Render; Shutterstock ID 2565680455; purchase_order: -; job: -; client: -; other: -

What would the surface of a neutron star look like?

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2XHMJ3E Mixed breed dog running through grass with large stick in mouth

Why do dogs bring back a stick if you throw it?

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RBJEJN Woman talking to her baby lying on a bed at home. Mother caring and pampering her baby.

Why do we speak to babies and pets in cute, silly voices? Part 2

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Headshot of a 13 year old teenage girl with purple hair and braces. She is standing outdoors with buildings out of focus in the background. She is rolling her eyes and frowning slightly, a typical adolescent.

This week鈥檚 new questions

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Ripples in the pond; Shutterstock ID 356810405; purchase_order: -; job: -; client: -; other: -

What would happen if water had no meniscus or surface tension?

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I want to warm up fast, should I put on聽my trousers or my top first?

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Exposures of clocks, watches, Time-Pieces of various kinds and periods. Photograph ?? Santosh Verma

Why are there 60 seconds in a聽minute and 60 minutes in an hour? part 2

One reader points out that the second corresponds to a human's typical resting heart rate

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This week鈥檚 new questions

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Does left-handedness or right-handedness make for a better pianist?

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Why do we speak to babies and pets in cute, silly voices?

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Is short-sightedness found in other animals? Part 2

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