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10 everyday objects
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They're the latest gadget craze: telescopic phone and camera holders that let you take selfies from a distance. But would you buy one?

Would you buy a selfie stick? Would you buy a selfie stick?

They're the latest gadget craze: telescopic phone and camera holders that let you take selfies from a distance. But would you buy one?

Q&A

These are volcanoes with a Volcanic Explosivity Index of 8 that throw out more than 1000km3 of material. By comparison, the 1980 eruption of Mount St Helens released 2.8km3. The...

It's not the fact that the Earth orbits the Sun that matters, but its tilt of around 23 degrees to the plane of the Solar System. That leads to some constellations being too low in the sky to see...

 Certain types of fig are male and female and so require a special breed of wasp to pollinate the females. The...

It’s partly because of time differences. If I fly from London to Tokyo, taking off at 6pm, I will arrive around 6am the following day by my watch. But the local time is 2pm (3pm during...

Yes – and the waste contributes far more radiation to the environment than nuclear power stations. The radioactivity comes from the trace amounts of uranium and thorium contained in coal....

Eating humans is not a great lifestyle choice, at least for vertebrates. Mainly this is because our normal living range doesn’t overlap much with that of wild animals. You’re...

A bath filled about a third of the way up (which takes the water level over your belly button when you lie down) requires around 75 litres. An ordinary electrically heated shower puts out four...

Doctors have long warned of the damaging effects of prolonged exposure to loud music via earphones. The popularity of portable cassette players in the 1980s led to studies claiming that around 1...

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