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Ask the Naked Scientists — Life Sciences
Ask the Naked Scientists

How many organs could you donate and remain alive? How many planet Earths could fit inside the Sun? How high is a giraffe’s blood pressure? Why is the sea blue? To find out, Ask The Naked Scientists!

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Latest Episodes:

Virus vs bacterium: what's worse? Dec 13, 2019

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What's an exponential dilemma? Why do copper bangles make your wrist go green? What causes hot flushes associated with menopause? Which is worse, viruses or bacteria? Why put power points at floor level? Can ketamine be used to treat mental illness? And why don't the bubbles from cracked joints cause an air embolism? Join Dr Chris and Kieno Kammies for the answers... Like this podcast? Please help us by supporting the Naked Scientists

Is mercury in vaccines safe? Dec 09, 2019

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Why are preservatives, including mercury compounds like thiomersal, added to vaccines? What is "invert sugar" and is it better for my teeth? How does is "aquamation" - the alkaline hydrolysis equivalent of a cremation - work? Is crude oil the same stuff everywhere, or does the composition vary? Can you clean your teeth with bicarbonate of soda? Why do knuckles crack? And what actually is "acidity". Join Dr Chris and Kieno Kammies for all the answers... Like this podcast? Please help us by supporting the Naked Scientists

How do hard water and soft water differ? Nov 29, 2019

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How does water-based water-repellent paint work? Did a burger on top of my normally vegetarian diet cause my belly ache? Why has no one invented a silent vacuum cleaner? And if an egg yolk ruptures, does that mean the egg is bad? Also, why the obsession with electric cars: surely hydrogen is the future? How do hard and soft water differ? And can blue-eyed parents have a brown-eyed baby? Join Dr Chris and Kieno Kammies for the answers on this week's Ask! The Naked Scientists... Like this podcast? Please help us by supporting the Naked Scientists

Does Prince Andrew not sweat in nightclubs? Nov 22, 2019

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Do flu jabs really work? What's a TB gland? Can Prince Andrew really not sweat? Why does pinching your nose halt a sneeze? How old is the Earth and how do we know? If dogs have such a keen sense of smell, why get so close to a turd to sniff it? Why does tiredness cause bags under the eyes? And what's the best time of day to clean teeth, morning or night? Want to know the answer, join Dr Chris Smith and Kieno Kammies to find out... Like this podcast? Please help us by supporting the Naked Scientists

Does swimming after lunch really cause cramp? Nov 15, 2019

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This week we're exploring why swimming on a full stomach might cause a cramp, whether it's really true that joints ache more when the weather's cold, and why does tapping the top of a beer bottle make the drink explode? Plus, why do aeroplanes fly high if there's less oxygen for the engines and less air for lift? And why does a child's hair often darken as they age? Join Dr Chris and Kieno Kammies for this week's Ask the Naked Scientist, to find out! Like this podcast? Please help us by supporting the Naked Scientists

Are bananas sterile inside? Nov 08, 2019

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What are the medical risks and benefits of silver? Is what I call a smell the same experience for you? And why do some things smell appealing, but not others? Does engine oil have a best-before date? And why do metal insulin needles have a use-by date? What makes body odours attractive? Is the inside of a banana sterile? And how do scientists find the medical properties of plants? Like this podcast? Please help us by supporting the Naked Scientists

Where would a bullet fired in space end up? Nov 01, 2019

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Does holding a car remote to your head really improve its range? What would happen to a bullet fired off the International Space Station? How did a marble make a hole smaller than itself in my window? Are mobile phone towers safe? Why does egg white go white when whipped? Why is colour blindness more common in men? And is toast bad for you? Join Dr Chris and Kieno Kammies for the answers to these and other cool science questions... Like this podcast? Please help us by supporting the Naked Scientists

Will salt make my pasta cook quicker? Oct 25, 2019

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Why is salt needed in an old-fashioned ice-cream maker? Are gravity and electromagnetism the same, and could we build a big enough electromagnet to repel the Moon? Are some stars no longer where we see them? Does salt make water boil hotter and hence will my pasta cook quicker? Why do distant lights twinkle? How does an air conditioner work? Why do my ear-buds make me cough when I insert them? What causes my microwave oven to interfere with my WiFi and Bluetooth? Is it possible to re-magnetise the magnet on the bathroom cabinet? Can we use light to propel a spacecraft? And why do we find our... Like this podcast? Please help us by supporting the Naked Scientists

What actually is a shooting star? Oct 22, 2019

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Is it ethical to grow a brain organoid in a dish? What's a shooting star? Do food preservatives build up in the body? What is cancer and why is it so tricky to treat? Why doe staring at a mobile phone screen cause car sickness on a long journey? Join Dr Chris and 702's Azania Mosaka and Ask! The Naked Scientists to find out... Like this podcast? Please help us by supporting the Naked Scientists

Can you suffocate under a duvet? Oct 18, 2019

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Why does alcohol affect different people differently? What's the difference between white and brown sugar, and is the brown form healthier? Can you suffocate under a blanket? Why have only 28 days in February? Why do wind turbines have long thin blades but room fans use shorter wide blades? Does diluting alcoholic drinks affect how drunk you become? Why is some metal okay in the microwave but other metallic objects make sparks? Join Dr Chris and 567 Cape Talk's Kieno Kammies for this week's crop of questions. As they say - don't know the answer? Ask the Naked Scientists! Like this podcast? Please help us by supporting the Naked Scientists

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