For those who are long or short-sighted, have you ever experienced an inability to focus on objects in the mirror - even though you should be close enough to the mirror to see them clearly? Find out why in this QotW. Plus, we ask what's happening when spine-tingling sounds give you the shivers. Like this podcast? Please help us by supporting the Naked Scientists

When two abnormalities in space time collide, what sort of mess are they likely to produce? Will we see it? Find out in this supermassive QotW! Plus, we ask why some objects stay blurry in the mirror. Like this podcast? Please help us by supporting the Naked Scientists

Given that a foetus is essentially a swimming thing on the end of a piece of string, how is it that the two don't become tangled more often? Find out in this jelly-like QotW. Plus, we ask what would happen if two black holes met. Like this podcast? Please help us by supporting the Naked Scientists

The pupil of the eye dilates in low-light conditions. Does this mean that the same amount is let into the eye when we wear sunglasses? Plus, we ask if babies can tie themselves in knots. Like this podcast? Please help us by supporting the Naked Scientists

Many people across the world are able to grow moustaches and beards, but are these the same as whiskers? Find out in this hirsute QotW. Plus, we ask if eyes overcompensate when wearing sunglasses. Like this podcast? Please help us by supporting the Naked Scientists

Astronauts have to put up with living in zero gravity, so how might they go about avoiding its ill effects? Find out in this body-bending QotW. Plus, we ask if humans have whiskers. Like this podcast? Please help us by supporting the Naked Scientists

Black holes emit Hawking radiation and gradually reduce in size, so is there a critical mass at which a black hole can no longer support itself? Find out in this QotW. Plus, we ask how much gravity can keep a human healthy. Like this podcast? Please help us by supporting the Naked Scientists

Human excrement burns quite well, so why not use it to power a house? But how could this be done? Find out in this fragrant QotW. Plus, we ask why black holes don't explode. Like this podcast? Please help us by supporting the Naked Scientists

Does being pregnant mean you have to breathe for two? Find the answer in this Question of the Week. Plus, we ask if poo power really is possible. Like this podcast? Please help us by supporting the Naked Scientists

Certain foods seem to complement each other while others grate; why is this? Is it a matter of personal taste, or is there some science behind it? Plus, we ask if pregnancy makes breathing harder work. Like this podcast? Please help us by supporting the Naked Scientists