Why is it that, when your mum asks you to move the TV aerial to a better position, the signal improves while you move it about and then degrades as soon as you let go? We find out what it is that makes the signal improve when you're holding a TV aerial. Plus, we ask how many offspring a sperm donor is likely to generate... Like this podcast? Please help us by supporting the Naked Scientists

We find out what vitreous floaters are and how they can be removed. Will a coil of wire do the trick? Plus, we ask why holding a TV aerial can improve the picture. Like this podcast? Please help us by supporting the Naked Scientists

How do spiders make such perfect webs? Are they expert architects, mathematical geniuses or natural engineers? Plus, we ask what the floaters in our eyes are, and if we can pull them out of the way... Like this podcast? Please help us by supporting the Naked Scientists

We find out why we were told as kids not to sit too close to the television. Is there any scientific basis to the warning? Plus, we ask how it is that spiders manage to build such intricate and regular webs without geometry equipment. Like this podcast? Please help us by supporting the Naked Scientists

We find out how sharks, proud owners of cartilaginous skeletons, make red blood cells without the aid of bone marrow. Plus, we ask whether it's safe to get up close and personal with your television set. Like this podcast? Please help us by supporting the Naked Scientists

Just what is the point to all those ridges and furrows set into our fingers, toes, palms and soles? We do some detective work on the answer. Plus, we ask how sharks make blood when they have bones made from cartilage. Like this podcast? Please help us by supporting the Naked Scientists

We discover what it is that makes fewer or more waves crash against the shore each minute. Is it the tides, the sun or the number of surfers? Plus, we ask, why do we have finger prints? Like this podcast? Please help us by supporting the Naked Scientists

We find out if and how plants might combat little nasties like bacteria and viruses. Plus, we ask what defines the frequency of ocean waves. Like this podcast? Please help us by supporting the Naked Scientists

We find out why tattoos can hang around for a lifetime. Plus, we ask if plants have an immune system. Like this podcast? Please help us by supporting the Naked Scientists

We find out how pacemakers keep your heart in check, even if you go running after a bus. Plus, we ask how tattoos manage to stay under your skin for so long. Like this podcast? Please help us by supporting the Naked Scientists