Do you really know?

Whether it's a matter of courtesy or preventing the spread of germs, it's not uncommon for people to hold back a sneeze. When this happens, the intercostal muscles contract strongly, but without the release of air if the nose is pinched or the mouth is closed. However, sneezing is a natural bodily reflex designed to expel dust, microbes, or any other irritating substances from the nasal cavity. Ou...

It's often said that drinking water while eating can make the stomach swell, causing bloating. But in reality, there are no studies to back that up. Similarly, drinking or avoiding drinking while eating also has no impact on the effectiveness of digestive juices or on any supposed difficulty in secreting them and therefore on digestion. We know that that water helps soften food boluses being diges...

Whether you're lounging on a beach, exploring a new city, or simply taking a break from your daily routine, finding ways to calm your mind while on holiday is really important for our mental and physical health. We often promise ourselves we’re going to disconnect from day one, but it's not as simple as that.  After all, when we’re at work our brains are constantly processing information, mak...

You’ve no doubt heard references to the existence of body clocks, and it’s no surprise because all of our bodily functions are regulated by the circadian system. To put it simply, our circadian rhythms optimise bodily functions. In this episode, we explain why it is important. They are managed by a master clock known as the circadian pacemaker which is formed of around 20,000 neurons. It’s si...

Have you ever been sure about a memory only to be told you’ve got it wrong? It’s a common experience: you confidently recall a detail from the past, only for someone to insist it didn’t happen that way. Or maybe you’re convinced you saw something with your own eyes when in reality, you only heard about it repeatedly. These are examples of false memories. They don’t mean you’re lying; in fact, you...

Shortsightedness or myopia affects long distance vision, preventing people from seeing objects over a few yards away. You may remember we covered the subject on Do You Really Know? a while back and that it has been labelled an epidemic due to ever increasing prevalence worldwide. It’s estimated that a third of all people suffer from myopia, and the World Health Organisation has suggested that half...

Have you ever cursed your luck at having a partner who snores, or spends the whole night tossing and turning in bed? It can be tempting to consider abandoning them to go and sleep on the sofa instead. Evidence suggests that sleeping next to someone does indeed have a pretty significant impact on adults’ sleep, whether that’s a partner, family member or even a pet. Researchers from the University o...

According to a study conducted by the Statistic Brain Research Institute in 2016, 74% of the global population feels uncomfortable speaking in front of an audience. That might be an oral exam at school, a presentation at work, or even making a toast at a birthday party for example. The symptoms are often the same: sweaty palms, shortness of breath and a racing heart. You may feel like you’re froze...

The microwave first emerged in the 1950s and has since become a common fixture in kitchens worldwide. 2018 data from Statista showed that 93% of UK household now own a microwave, with that figure also being over 90% in the United States according to the US Bureau of Labor Statistics.  Love it or hate it; you can’t deny that it’s hard to beat the microwave for convenience when it comes to quic...

You’ve probably seen the photos of stars like Courteney Cox or Simon Cowell, who have recently revealed a more natural look after removing their facial fillers or perhaps are one of Kylie Jenner’s 381 million followers and saw that she had recently dissolved her lip filler. But what prompted this change? Fillers are injectable substances that are used to plump up areas of the face that have l...

Figuring out how well the economy is doing might seem like the preserve of those working in big accounting firms or financial institutions, dealing with complicated graphs and calculations on a daily basis. But in reality, we’re exposed to certain clues going about our everyday lives, without even realising that they offer insight into our spending habits. An interesting example to look out for is...

You might assume that your toilet bowl is the dirtiest place in your flat or house, but in fact that’s pretty far from the truth. Our homes are actually filled with items that are perfect hosts for germs and bacteria, and sometimes it’s the objects you least suspect. For example those in your kitchen or bathroom in particular. According to BBC Food, the domestic kitchen is to blame for a fair shar...

Hi, this is the Do You Really Know team! If you want to improve your French the easy way, listen to Maintenant Vous Savez, the French version of our podcast! In just 3 minutes, we explore topics that matter to you: money, consumer issues, society, culture, work… All in clear, accessible French. Maybe it’s time to improve your French? Tune in every day to “Maintenant Vous Savez,” available on all s...

Mouth taping involves putting tape over your mouth. It's supposed to improve your sleep by forcing you to breathe through your nose rather than your mouth. Regular listeners will be aware that we’ve discussed a number of Tiktok trends on this podcast. Not long ago, we covered the Blackout challenge after it led to the tragic deaths of a number of young children. As of yet the mouth taping trend we...

Are you more of an introvert or an extrovert? Or maybe a bit of both? While introverts often need solitude to recharge and feel more comfortable alone, extroverts thrive on interaction, seeking out social situations and sometimes feeling uneasy in isolation. These two categories are often seen as opposites, but experts at psychologue.net suggest that personality traits actually exist on a spectrum...

If there’s one trait nobody wants to claim, it’s stinginess. But being stingy isn’t about how much money you have. Take Ingvar Kamprad, the founder of IKEA—despite his fortune, he lived modestly and even shopped at flea markets. For him, frugality was a habit, not an obsession. But when caution with money turns into an all-consuming need to save at all costs, it can impact not just your finances,...

Whether you’re planning a short trip or a long-haul adventure, you want to make sure your home is safe and sound while you’re away. Here are some steps you can take to protect your property and prevent unwanted visitors. Smart devices can offer various advantages for keeping your home safe while you’re away. Of course, there are many more things you can do depending on your situation and preferenc...

Everybody loves a rags-to-riches story, but the reality is social mobility is far from easy. Class-passers are those who manage to successfully improve their status and navigate their new life as part of a higher socioeconomic group. To understand class-passing, let’s first discuss the idea of social classes. Within our societies, people are divided according to factors like their family backgroun...

According to the British Snoring and Sleep Apnea Association, 41% of the UK population snore, which means there are approximately 15 million snorers in the country. That in turn means 30 million people are affected by snoring, given that the noises can prove disturbing to a partner or family member’s sleep. Of course when we breathe, oxygen passes through our nose, then behind the palate to reach...

We've all had that moment of slipping on our headphones heading to school or work and feeling like an unstoppable force. But while most of us leave that unwavering confidence at the front door, for some, it's a whole different story. Their analyses are top-notch, decisions flawless, and social networks unbeatable. This phenomenon has a name – it's called the "god complex." Where does this god comp...

You have to navigate an almost endless list of uncertainties when raising a child, and it’s hard to figure out the best approach to parenting. At one end of the spectrum, you’ve got so-called helicopter parents, who micromanage every aspect of their children’s lives, and at the other end parents who are so hands-off that some label them as lazy. Maybe sometimes they are lazy. But in other cases, l...

We talked about omplaphobia in a recent episode of Do You Really Know, which is the fear of belly buttons. Well the subject of today’s episode may make for awkward listening for anyone affected by that phobia. That’s right; we’re talking about belly buttons again. Now, be honest: when was the last time you washed your belly button in the shower? It’s commonly overlooked, but surprisingly it’s actu...

We’ve talked about eco-anxiety before on Do You Really Know, and it’s real. A survey published in the Lancet in December 2021 found that 75% of young people thought the future was frightening. But others are preaching a more positive outlook, with cautious climate optimism looking set to be a trend in 2023. While our fears around the climate crisis are justified and useful, if they paralyse us out...

You might be surprised to learn that how we use our electric devices can make real changes to our energy consumption and our bills. So here are some simple tips to help you change your habits and save on your energy bills.  Many appliances use energy even when they are on standby. Chargers still draw power even if the device is not connected, media players, Phones with displays that show when not...

If you’ve ever felt strangely sad after having sex, you may have wondered what on earth was wrong with you. After all, we’re supposed to lie around in a haze or cuddle up to our partner in a state of post-orgasmic bliss, every single time. At least that’s what popular culture would have us believe. But rest assured, if that’s not the case for you, you’re not alone. Indeed, a lot of people have exp...