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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

When going swimming in the sea is it better (scientifically, emotionally or spiritually) to enter quickly or to take your time? And there is a huge amount of sound generated in the world, which takes energy. As the sound dissipates, what happens to this energy?

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?

Pink flowering pelargonium turning red.

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

2A65AYC Woman stroking her Pet dumbo rat

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

Four cheerful female friends having fun on summer road trip

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

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

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?

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?

Eucalyptus Wandoo or White Gum, endemic to the Southwest of Western Australia. A gum tree native to this area of the WA Wheatbelt.

This week鈥檚 new questions

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

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

Our readers suggest that dogs use both smell and years of visual pattern recognition to recognise their fellow canines - but ask what 鈥榬ecognise鈥� actually means here

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

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

This week鈥檚 new questions

If we all lined up with our arms touching, where would this circle be?