science questions

How much water should you drink in a day? Can miscarriages be prevented? What's more efficient - leaving the hot water on constantly, or heating it only when needed? Why are some eggs double yolkers? What's the point of flies? And why do some people have more than five fingers? Join Dr Chris for another crop of South Africa's top science questions on Talk Radio 702... Like this podcast? Please help us by supporting the Naked Scientists

Why would your feet seem further away when lying down? We put our visual depth perception to the test to find out how being horizontal could change the way you see the world. Plus, we ask if wearing sunglasses increases your risk of getting sunburned? Like this podcast? Please help us by supporting the Naked Scientists

On Ask! The Naked Scientists this week, an injection to combat obesity, and we debate whether pigeons can tell one another apart... Like this podcast? Please help us by supporting the Naked Scientists

Why do some things dissolve but others don't, what are the stains on the towels at the gym and how do astronauts keep their balance in the absence of gravity? Also, what causes meteor showers, can you sneeze in your sleep, what's the best way to dislodge a foreign body in the eye, what is pancreatic cancer and what causes sweaty hands and feet? The answers to this lot, plus news of how Earth came by its water and a chemical to keep unblocked arteries clear...

Why do some things dissolve but others don't, what are the stains on the towels at the gym and how do astronauts keep their balance in the absence of gravity? Also, what causes meteor showers, can you sneeze in your sleep, what's the best way to dislodge a foreign body in the eye, what is pancreatic cancer and what causes sweaty hands and feet? The answers to this lot, plus news of how Earth came by its water and a chemical to keep unblocked arteries clear... Like this podcast? Please help us by supporting the Naked Scientists

Why do onions make you cry and will a frozen onion have the same tear-jerking effect? What medicinal qualities does aloe vera possess? Is ice-crunching harmful? What's the best way to prop up metabolism as we age? What can I do about stress incontinence? Plus, news of what Tweets posted online can tell us about the population's collective mood, and a new way to tell who needs extra investigations after a heart attack...

Why do onions make you cry and will a frozen onion have the same tear-jerking effect? What medicinal qualities does aloe vera possess? Is ice-crunching harmful? What's the best way to prop up metabolism as we age? What can I do about stress incontinence? Plus, news of what Tweets posted online can tell us about the population's collective mood, and a new way to tell who needs extra investigations after a heart attack... Like this podcast? Please help us by supporting the Naked Scientists

Where and in what volume is mucus made in the body? Why do bums look darker that skin elsewhere on the body? How does laughter or low mood affect health and immunity and what causes urticaria? Join Dr Chris for the answers as well as news of a new gene screen technique to find new treatments using old drugs and why climate change is driving animals uphill...

Where and in what volume is mucus made in the body? Why do bums look darker that skin elsewhere on the body? How does laughter or low mood affect health and immunity and what causes urticaria? Join Dr Chris for the answers as well as news of a new gene screen technique to find new treatments using old drugs and why climate change is driving animals uphill... Like this podcast? Please help us by supporting the Naked Scientists

Do bubbles act like insulation on the surface of your bath? Will it prevent the need for that toe-burning hot water top up? Find out in this QotW! Plus, we ask how solar sails stay aloft on simple sunlight... Like this podcast? Please help us by supporting the Naked Scientists

Is it true that there are more earthquakes now than in the past, and that they are more intense? We explore the problem in this Question of the Week. Plus, we ask if non-coding DNA has a purpose. Like this podcast? Please help us by supporting the Naked Scientists

Can a tropical storm be steered? Why should a stone hitting the outside of a window produce a chip on the inside surface? Why do aircraft sound louder going away than when they approach? Dr Chris gets to grips with another crop of top questions as well as news of a new magnetic material activated by electrons, a dye to image the insides of arteries and how scientists have sized up the shape of the electron... Like this podcast? Please help us by supporting the Naked Scientists

Can a tropical storm be steered? Why should a stone hitting the outside of a window produce a chip on the inside surface? Why do aircraft sound louder going away than when they approach? Dr Chris gets to grips with another crop of top questions as well as news of a new magnetic material activated by electrons, a dye to image the insides of arteries and how scientists have sized up the shape of the electron...

Is standing or reclining best for the perfect suntan? Can we see atoms? Why add pennies to Big Ben's pendulum? It's a question and answer show so we shoulder your scientific conundra! We'll find out how web companies keep up with growing data demands, what causes white ridges on fingernails, and why a clean glass keeps cola fizzier. Plus, in Kitchen Science, we find out how to balance a broom whilst blindfolded! Like this podcast? Please help us by supporting the Naked Scientists

Why is sea level rising, are organ transplants between males and females feasible, what keeps a moving bike upright and what causes epilepsy? Join Dr Chris for the answers to this week's crop of top questions as well as how climate change is denting wheat and maize yields and how the box jellyfish can see where it's going...

Why is sea level rising, are organ transplants between males and females feasible, what keeps a moving bike upright and what causes epilepsy? Join Dr Chris for the answers to this week's crop of top questions as well as how climate change is denting wheat and maize yields and how the box jellyfish can see where it's going... Like this podcast? Please help us by supporting the Naked Scientists

What causes the rainbow of colours around an aircraft's shadow, why are moths and mosquitoes attracted to lights, plasma vs LCD TV - what's the difference, how does a mosquito know when it's full of blood, are you ever too old to learn, and how do scientists calculate the calories in foods? Join Dr Chris for this week's bumper crop of questions from TalkRadio 702... Like this podcast? Please help us by supporting the Naked Scientists

What causes the rainbow of colours around an aircraft's shadow, why are moths and mosquitoes attracted to lights, plasma vs LCD TV - what's the difference, how does a mosquito know when it's full of blood, are you ever too old to learn, and how do scientists calculate the calories in foods? Join Dr Chris for this week's bumper crop of questions from TalkRadio 702...

This week, we discover the reasons for those aches and pains known as cramps. What causes them and how can they be prevented? Like this podcast? Please help us by supporting the Naked Scientists

How do magnets multiply? What keeps an aeroplane in the air? How do wild animals avoid incest? It's open season on science questions in this week's Naked Scientists. We'll find out if oil extraction leaves a cavity, can cranberry juice cut urine infection rates and what happens when two lightning bolts collide? In the news, evidence of bipedalism in an early human ancestor, how oily fish helps avoid common causes of blindness and how smartphones are taking the pain out of cardiac rehabilitation. Plus, in Kitchen Science, the unexpected physics of a flying balloon. Like this podcast? Please help us by supporting the Naked Scientists