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Ben Lomond ski village and wild kangaroos on a quiet winter's day in Tasmania, Australia; Shutterstock ID 1815999107; purchase_order: -; job: -; client: -; other: -

Would a northern hemisphere 鈥渋ce age鈥� trigger one in the south too?

If a northern hemisphere "ice age" is triggered, say due to the Gulf Stream failing, is it inevitable in the southern hemisphere too?

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Big dog meets small dog; Shutterstock ID 2045462630; purchase_order: -; job: -; client: -; other: -

How do dogs recognise that another animal is also a dog? (continued)

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2GA52R4 A woman on the beach at Portrush, Co. Antrim, on Northern Ireland's north coast doing open water swimming in the Atlantic Ocean.

This week鈥檚 new questions

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JANUARY 9, 2014: The vibrant magentas and blues in this Hubble image of the barred spiral galaxy M83 reveal that the galaxy is ablaze with star formation. The galactic panorama unveils a tapestry of the drama of stellar birth and death. The galaxy, also known as the Southern Pinwheel, lies 15 million light-years away in the constellation Hydra. Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) Acknowledgement: W. Blair (STScI/Johns Hopkins University) and R. O'Connell (University of Virginia) NASA image use policy. NASA Goddard Space Flight Center enables NASA?s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. ...more Date Created:2017-12-08 Center:GSFC Keywords: spiral galaxy M83 Albums: Test Creator:NASA Goddard Location:Greenbelt, MD

What would happen to a galaxy if the black hole at its centre left?

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Pink flowering pelargonium turning red.

Why did a piece of pink geranium make red flowers after breaking off?

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2A65AYC Woman stroking her Pet dumbo rat

Given the impact of cats, why don鈥檛 we domesticate more rats? (Part 2)

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Four cheerful female friends having fun on summer road trip

Which is more efficient when cooling a car, A/C or windows? (Part 2)

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Mandatory Credit: Photo by Dasha Petrenko/imageBROKER/Shutterstock (13916956bb) Gym woman doing push up exercises with dumbbells. Strong brunette female doing crossfit workout Various 23afbhbada

This week鈥檚 new questions

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The surface of Venus, the irregularities of the planet. Elements of this image furnished by NASA. High quality photo; Shutterstock ID 2157724597; purchase_order: -; job: -; client: -; other: -

Would it be theoretically possible to build a habitable dome on Venus?

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A close up of an Old Indian Square coin or Currency ( Written 20th Part of Rupee, 5 Paise, 1968 in Hindi Language ) ; Shutterstock ID 1555549076; purchase_order: -; job: -; client: -; other: -

Why does a ‘square’ coin sliding down a slope soon fall over?

A round coin stays up because of its rotational inertia - so long as it is rotating, it will stay upright. But there is nothing to keep a square coin upright, so over it goes, say our readers

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This week鈥檚 new questions

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How do dogs recognise other dogs when there are so many canine types?

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Spraying a can of deodorant, why does it get cold when it runs out?

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Why do humans pat animals on the head? (continued)

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