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This week’s new questions

What makes a cake a cake and a biscuit a biscuit? And is there an upper limit to temperature, akin to absolute zero?

25 August 2021

2D6CTBM Wedding candy bar with different colored bright cupcakes, macaroons, cakes, jelly and fruits.

Iuliia Versta/Alamy

Scientifically speaking, what is the difference between a cake, a biscuit and a sponge?

Dee Muggle, UK

 

JJJYM5 Frost Mountain

Emmanouil Michellis/Alamy

If absolute zero is the lowest possible temperature for matter, is there an upper limit or highest possible temperature?

Chris Tatler, Hamilton, New Zealand

 

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