Nikki Withers

Recent articles by Nikki Withers

Where will all the oil from Deepwater Horizon go?

The effects of the Deepwater Horizon oil spill is likely to be seen for decades.
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Why do old men have big ears?

All the better to hear you with, my dear...
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How many times can a worm be split in half and still grow back?

Contrary to popular belief, worms cut in half don't actually turn into two new worms.
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Do whales sleep?

Do whales dream of aquatic sheep?
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Why do fish float when they die?

Most fish sink to the bottom of their habitats when they die but they become more buoyant as the process of decomposition takes over.
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Could it ever snow on Mars?

There's snow place like Mars, apparently.
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What is the largest animal ever eaten by a Venus flytrap?

Dionaea muscipula is one of the few carnivorous species in the plant world, so it's only natural to wonder about the biggest creatures they can lure & eat.
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How long has Antarctica been frozen?

Antartica hasn't always been covered in ice and snow, but over the millennia it has transformed from an icy forest to a frozen desert.
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How far away is the horizon?

The horizon isn't a static property; its distance from you depends on your height and the surroundings at the time - but there is a formula you can use to calculate its distance.
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Why does mild cheddar slice more easily than mature cheddar?

Sometimes it is easier to cut the cheese than you think...
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Why does shampoo make your eyes sting?

The eyes are a vulnerable entry point for bacteria, dirt, and... shampoo. But what is it in particular that makes us tear up?
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When did we start burying our dead?

The act of burying the dead can be traced back to the Neanderthals but when did ritual human burials start?
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How do we know the temperature at the centre of the Sun?

Though currently impossible to go there and take measurements, we can estimate the core temperature of the sun using maths.
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How strong does a magnetic field have to be to affect the human body?

It’s one of the fundamental forces, and we rely heavily on them. They can do some damage too…
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How do wireless charging mats work?

Wireless charging, or inductive charging, works by transferring energy form the charger to the device through electromagnetic induction.
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If you run east, are you running faster than if you run west?

All motion is relative to something else, so it depends on what you're comparing your speed to.
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At what speed would you need to go to stop a speed camera photographing your plates?

To beat those fines you will need to challenge the traffic enforcement camera to a race.
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What is intelligence?

Figuring out what intelligence is is a controversial topic, and one that psychologists have been arguing over for centuries.
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How are the seismometers that measure earthquakes calibrated?

These devices are an important part of recording and understanding potentially destructive seismic activity, carefully designed to detect the smallest tremors.
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How do touch lamps work?

Touch-sensitive lights seem simple enough but their switches work on the principle of body capacitance.
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How much does human breathing contribute to climate change?

All those billions of bodies exhaling carbon dioxide with every breath really starts to add up...
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How can we be sure that medical body scans are safe?

It depends on the scan. For example, when you have an x-ray your body is exposed to radiation, but there is minimal risk to your health.
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Is it bad for you to skip breakfast?

Health and mood benefits aside, why would you even do such a thing!
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How much does a cloud weigh?

Clouds may look light and fluffy, but those big white things floating overhead can have some weight to them.
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