This week, the intriguing question of how visible light, but not microwaves, can escape through the grille of a microwave oven, how far Earth and Mars are apart, the speed of a falling meteor, why parking a car in reverse is easier, the reason that oil and water won't mix, and the prospects of alien life. Join Dr Chris Smith and Talk Radio 702's Azania Mosaka for the answers... Like this podcast? Please help us by supporting the Naked Scientists

What causes phantom limb pain? How does the bladder control when it fills and empties? What the F are food E numbers? Where does medical oxygen come from and will we run out? How fast does the brain switch off after decapitation? Why don't bats suffer a rush of blood to the head when they sleep upside down? And what causes catatonia? Join Dr Chris Smith and 567 CapeTalk's Kieno Kammies for the answers... Like this podcast? Please help us by supporting the Naked Scientists

This week, if something could move faster than light, how would we detect its speed? Also, why do we cry, and why do the experiences of others make my feet tingle? How far from Earth is Mars, why has smoking been banned in South Africa during Covid lockdown, why are wind turbines not placed single-file, how long am I infectious with Covid-19, and can you smell in space? Join Azania Mosaka and Dr Chris Smith for the answers... Like this podcast? Please help us by supporting the Naked Scientists

The UK eases the lockdown... a little bit, what makes our eyes move together, what makes Earth so special when it comes to supporting life, how long does a journey to Mars take, why can't I take my chemotherapy by mouth, does a mirror multiply light, and is climate change down to us, or natural temperature cycles? Join Dr Chris and Talk Radio 702's Azania Mosaka for the answers... Like this podcast? Please help us by supporting the Naked Scientists

This week how birds keep warm in winter, how long to recover from ventilation for Covid-19, when do doctors need to ventilate a patient, seeing your own brain by MRI, why sunlight is warmer in summer, and can infrared light kill Covid? Join Dr Chris Smith and 567 CapeTalk's Kieno Kammies for the answers... Like this podcast? Please help us by supporting the Naked Scientists

How to sterilise a facemask: will zapping it in a microwave oven, or steaming it over a kettle work? What's the deal with UVC to kill coronaviruses? Are books returned to libraries an infection risk? And what about deliveries of flowers? Can garlic fend off infection? Why do fridges jolt on? And is a plane journey a risk factor for infection? Join Dr Chris Smith and Kieno Kammies for the answers... Like this podcast? Please help us by supporting the Naked Scientists

This week where methanol comes from in home brewing, 5G and the coronavirus conspiracies, why cut flowers still need water, rice behaving bizarrely in the microwave, whether wind blows away infections, exploding jugs of custard, safe alcohol consumption, why light has the speed it does, and why weather stops a space launch. Join Chris Smith and Lester Kiewit for the answers... Like this podcast? Please help us by supporting the Naked Scientists

Engine efficiency, what happens when the Earth's magnetic field flips, what is a solar minimum, why are some people shorter than others and what causes dwarfism, and how can I tell planets from stars? Join 702's Azania Mosaka and Dr Chris Smith for the answers... Like this podcast? Please help us by supporting the Naked Scientists

Antibody tests for Covid-19, do mild Covid cases produce as many antibodies as more severe infections, what is covid viral load, where did the water on Earth come from, how do diuretics work, why does cooked fruit taste more sour, how are memories laid down, what are the thin bones in a chicken leg, and do carrots really help us see in the dark? Dr Chris Smith and 567 CapeTalk's Pippa Hudson have the answers... Like this podcast? Please help us by supporting the Naked Scientists

This week, Rasmussen's encephalitis and brain surgery, are packages safe from coronavirus contamination, do blood groups affect Covid-19 risk, why does the SARS-CoV-2 coronavirus appear to spread better in some places than others, what is heart ejection fraction, and how do I disinfect my groceries? Join Dr Chris Smith and Kieno Kammies from 567 Cape Talk, for all the answers... Like this podcast? Please help us by supporting the Naked Scientists