Question Of The Week - From The Naked Scientists

This week we've been against the clock to get the answer to this question from David "What measurement of time would you use in travelling through space as a day, week, month or a year would become meaningless, and how would this affect the body clock?" Eva Higginbotham spoke to space sleep expert Cassie Hilditch, and also former NASA astronaut Steve Swanson, to find out the answer... Like this podcast? Please help us by supporting the Naked Scientists

This week we're flushing out the answer to this question from Charlie: "Maybe this is just me, but it dawned on me that whenever I have to hold in a pee, the need to go increases exponentially when I know that relief is close. Why is this?" So to relieve Charlie of his question, I asked physiologist Bill Colledge from Cambridge University to expel the answer... Like this podcast? Please help us by supporting the Naked Scientists

Six-year-old listener Jonathan asks: "when you stir a bucket of water, I know the water is pushed to the outside; however, why do any particles end up the centre after the water has finished spinning? I have asked my Dad, but he doesn't know." Phil Sansom found someone who does know - and it's fluid dynamics expert Dan Nickstroem... Like this podcast? Please help us by supporting the Naked Scientists

Lionel got in touch to ask us about a curious phenomenon he's noticed since installing a new sensor, raising the question whether our brains process light or sound faster. Eva Higginbotham spoke with Brian Moore of the University of Cambridge who helped us unpick the answer... Like this podcast? Please help us by supporting the Naked Scientists

Johnny asked us if burying paper counts towards carbon sequestration. To dig up an answer, Adam Murphy spoke to Shaun Fitzgerald, Royal Academy of Engineering Visiting Professor at the University of Cambridge, about how useful that really is... Like this podcast? Please help us by supporting the Naked Scientists

Julie got in touch to ask whether there was any reason to wash, rinse and repeat, or if it was just marketing hype. Phil Sansom spoke to two hair specialists, Sally-Ann Tarver and Eva Proudman, about this hairy issue... Like this podcast? Please help us by supporting the Naked Scientists

Carol got in touch to ask "The government has provided more than a billion items of PPE to hospitals. There have been 130,000 COVID cases in hospitals, about 10,000 items of PPE per patient. Can you find out why so much?" Eva Higginbotham put the question to medic Isabelle Cochrane... Like this podcast? Please help us by supporting the Naked Scientists

Neerav wanted to know why some things dissolve faster than others, so we spoke to University of Cambridge chemist Ljiljana Fruk to find out... Like this podcast? Please help us by supporting the Naked Scientists

Sam got in touch to ask: "If identical twin brothers marry identical twin sisters, and each of those couples has a child, will those two children be like twins?" Eva Higginbotham put the question to Tessa Bertozzi - a geneticist at the University of Cambridge. Like this podcast? Please help us by supporting the Naked Scientists

Darren got in touch to ask us: "Golf balls are dimpled to disrupt the air around the ball. As far as I can gather, this reduces their drag and allows them to fly further than they would if they were perfectly round. Why do we not see dimpled cars, aircraft, and trains? If this effect is so effective for golf balls, why not use it on Formula 1 cars, for instance?"Adam Murphy went looking for a hole-in-one to this question, and spoke to Sam Grimshaw from the Whittle Lab at the University of Cambridge... Like this podcast? Please help us by supporting the Naked Scientists

We've been hunting down the answer to this questions from Denise: "There are plants that contain saponins and were used by Australian aboriginal people as bush medicine. Is there any research on the antiviral properties of saponins in, for example, Australian Acacia species, or other plants?" Eva Higginbotham spoke with Maher Mohamed Abed El Aziz from the University of Tripoli in Libya, and Anthony Davenport from the University of Cambridge, to find the answer. Like this podcast? Please help us by supporting the Naked Scientists

We're blasting off to the International Space Station to answer this question from listener Fady: "has life changed for astronauts on the ISS due to coronavirus, and are astronauts still allowed to be sent to and from the ISS?" Phil Sansom roped in flight surgeon Filippo Castrucci from the European Space Agency... Like this podcast? Please help us by supporting the Naked Scientists

Rakesh got in touch with this question: "Typically when electrons flow for the electric current, do they come out from the atoms and flow as electric current? Is it not true that when electrons come out from atoms light and energy is released? So why don't electric wires change their colours?" Eva Higginbotham got in touch with Dr Ankita Anirban to find out the answer... Like this podcast? Please help us by supporting the Naked Scientists

Matt got in touch with this question: "Do all humans have the same number of nerve endings in their skin, and if so, do those of us who are bigger, either taller or fatter, have reduced sensitivity in a given area of skin?" Eva Higginbotham spoke with Professor Francis McGlone from Liverpool John Moores University to feel out the answer... Like this podcast? Please help us by supporting the Naked Scientists

Pavel asked us "On one of the Naked Scientists programmes it was mentioned that a newborn baby has initially sterile intestines and gets most of its microbiome during the passage through the uterus and vagina. What happens to children that are brought into this world via caesarean?" We reached out to Peter Brocklehurst from the University of Birmingham to find out... Like this podcast? Please help us by supporting the Naked Scientists

Listener Jon sent us this question: "I just purchased some dart frogs which need to live in high humidity conditions. In order to attain this we basically sealed off the terrariums. The question is whether a really sealed terrarium could provide enough oxygen for the frogs through plant photosynthesis alone. Who would win: the frogs or the plants?" Phil Sansom got the answer to this 'pet peeve' from plant scientist Stephanie Smith... Like this podcast? Please help us by supporting the Naked Scientists

Fusion could be the most sustainable source of energy in the future. But how much can we get out of it? Like this podcast? Please help us by supporting the Naked Scientists

Dogs come in all sizes, from tiny Chihuahuas to giant Great Danes. Their head size is hugely different, as must be their brain size. Does this mean that a Great Dane is massively more intelligent than a Chihuahua? Like this podcast? Please help us by supporting the Naked Scientists

Is a kitchen sponge full of bacteria, and will a microwave kill them? We tested this at home and asked an expert! Like this podcast? Please help us by supporting the Naked Scientists

Listener Robin asks: "I heard on the podcast, that the reason why we get a sunburn, is that the body is trying to fix cells that are damaged by UV radiation. So if one person is sunburned longer than another, does that mean their immune system is worse?" To find an answer to this burning question, Adam Murphy spoke to dermatologist Jane Sterling... Like this podcast? Please help us by supporting the Naked Scientists