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Sore Tooth Decay. Dental Care And Pain; Shutterstock ID 1895847487; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Why do we have nerve endings in our teeth when they seem to serve no useful purpose? And when doing strenuous exercise, why does it seem to help to call out the number of repetitions?

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T4AEYJ Stellar explosion shining in deep space, cosmic star blast in Universe. High resolution galaxy background.

In which direction in the sky did the big bang take place?

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Humans have 鈥済ood bacteria鈥�, but what about 鈥済ood viruses鈥�?

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Funny little girl watering from a hose flowers in her home garden. Rural life. Happy child is resting in the summer, playing with water and watering the greens with a hose evening; Shutterstock ID 2138202117; purchase_order: -; job: -; client: -; other: -

What鈥檚 the best angle for a hosepipe to spray water furthest? (Part 2)

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This week鈥檚 new questions

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Milk coffee is a combination of equal parts espresso, steamed milk and milk froth.

Does a latte cool faster than a cappuccino?

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Loosen bolt in daylight close up.; Shutterstock ID 1195047430; purchase_order: -; job: -; client: -; other: -

Why do loose screws only get looser and not the other way round?

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mist, rain

How fast would you have to travel to be able to run on water? (part 2)

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This week鈥檚 new questions

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If the house always wins, how do professional gamblers make a living?

Our readers outline the successful formulas to beat the betting odds

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Is it theoretically possible for our memory to become full?

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This week鈥檚 new questions

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Why are many people squeamish about the sight of blood?

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What crops did Europeans bring to the Americas?

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