Do you really know?

Why don't scars disappear?

16 Aug 2025

Contributed by Lukas

When our skin is cut or damaged, the body immediately starts its healing process to close the wound and limit any risk of infection. It’s a wonderfu...

Is Bedrotting bad for your health?

16 Aug 2025

Contributed by Lukas

Whether it’s reading, journaling, enjoying breakfast, or scrolling through social media, these are just a few activities people indulge in while lou...

Why do we get travel sick?

16 Aug 2025

Contributed by Lukas

During summer holidays, many of us experience the discomfort of motion sickness while travelling by car, coach, plane, or boat. motion sickness is Als...

Can I reuse sunscreen from one year to the next?

15 Aug 2025

Contributed by Lukas

Sunscreen is essential when on holiday, and in the summer in general. But it doesn’t come cheap, and often the contents aren’t fully used by the t...

What is sea snot?

15 Aug 2025

Contributed by Lukas

In the last few weeks, a thick and foul-smelling foam known as mucilage has appeared in the Marmara Sea on Turkey’s northwestern coast. It’s been ...

What are the world's least safe travel destinations?

15 Aug 2025

Contributed by Lukas

In past episodes of Do You Really Know, we’ve talked about the best holiday destinations in the UK and abroad, as well as how to find the most budge...

How is AI being used in the legal system?

14 Aug 2025

Contributed by Lukas

ChatGPT has been invading all walks of life in recent months, and that even includes the justice system. In late March 2023, a Pakistani judge consult...

How can I stop micro-awakenings from disrupting my sleep?

14 Aug 2025

Contributed by Lukas

According to a Direct Line Group study from 2022, over 70% of UK adults don’t get the recommended 7-9 hours of sleep per night. Nighttime micro-awa...

How can I relax my brain while on holiday?

14 Aug 2025

Contributed by Lukas

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 ho...

Why can't Royals take selfies ?

13 Aug 2025

Contributed by Lukas

If you ever meet a member of the royal family, you might be tempted to ask them for a selfie or an autograph but don’t be surprised if they politely...

Could I save more money by cash stuffing?

13 Aug 2025

Contributed by Lukas

With inflation at the highest it’s been in 45 years, it’s no wonder people are looking for ways to manage their money more effectively. And the tr...

How much money makes you happy?

13 Aug 2025

Contributed by Lukas

Money can buy a lot, but can it buy happiness? This is a question that philosophers, economists, scientists and storytellers have puzzled over for so...

How do sim swapping scams work?

12 Aug 2025

Contributed by Lukas

Most of us have our smartphones on our person more or less all day, every day. Our photos, payment methods and a lot of personal data are stored on th...

Why are some deadly diseases re-emerging?

12 Aug 2025

Contributed by Lukas

If you're not up to date with your vaccinations, it might just be time to schedule an appointment with your doctor! When it comes to the diseases we’...

What is bae-realing, the new dating trend?

12 Aug 2025

Contributed by Lukas

Ever since social media came along, dating trends have evolved constantly. They tend to reflect changes in society too. In previous episodes of Do You...

What is Neo-Luddism, the growing anti-technology movement?

11 Aug 2025

Contributed by Lukas

In today’s ultra-connected society, more and more technologies are emerging all the time, and they’re getting increasingly advanced. Just look at ...

Why does looking at the sun make me sneeze?

11 Aug 2025

Contributed by Lukas

We usually sneeze to protect ourselves from irritants such as pollen, dust, or chemicals. But there are some people who consistently sneeze when they ...

Does sex help us to sleep better?

11 Aug 2025

Contributed by Lukas

According to Mental Health UK, nearly one in five people in the country don’t get enough sleep. We’ve talked about various types of sleep disorder...

Why are there so many spin offs in the world of cinema?

10 Aug 2025

Contributed by Lukas

The world of cinema is full of films and sagas which leave their mark on a generation, sometimes becoming cult films. And another phenomenon is becomi...

How can we choose the right sunscreen product?

10 Aug 2025

Contributed by Lukas

Whether you’re going on a beach holiday, city break or camping trip, the chances are you’ll be soaking up the sun’s rays. Sunshine activates vi...

Are baths or showers better for our health?

10 Aug 2025

Contributed by Lukas

When it comes to getting clean, some people prefer chilling in the bath for a good half an hour or more, while others like how quick and practical it ...

Why are four leaf clovers considered lucky?

09 Aug 2025

Contributed by Lukas

You’ve most likely heard of this plant before, and seen one if you were lucky! Maybe you’ve even tried to find one in a field or a garden. The fou...

What's really in vegan meat substitutes?

09 Aug 2025

Contributed by Lukas

Despite the rising popularity of vegan or vegetarian lifestyles, many people still love the taste and texture of meat, or simply can’t kick the habi...

What are the benefits of slow sex?

08 Aug 2025

Contributed by Lukas

We all know that having sex is a great form of stress relief. It releases pleasure hormones, like endorphins and oxytocin, also reinforcing the cardio...

What are the biggest misconceptions on beating heatwaves?

08 Aug 2025

Contributed by Lukas

According to a World Meteorological Organisation report from May 2023, it’s now more likely than not that global temperatures will surpass the key m...

What are 3 sex tips to give your relationship a boost?

08 Aug 2025

Contributed by Lukas

You might or might not  be surprised to learn that warm weather naturally enhances the libido. According to a 2022 survey by the Kinsey Institute, 60...

How can the unisex condom improve my sex life?

07 Aug 2025

Contributed by Lukas

It was widely expected that the condom industry would thrive throughout the Covid-19 pandemic, but to many people’s surprise, it actually struggled....

Could tourism quotas help preserve endangered local environments?

07 Aug 2025

Contributed by Lukas

It’s worth bearing in mind that overtourism has become a real nuisance. As tourists, it’s not exactly fun being in a highly overcrowded area, but ...

Can jellyfish offer the key to immortality?

07 Aug 2025

Contributed by Lukas

Throughout history people have been keen to find the answer to immortality. It's now commonly accepted that eternal life is not possible. Yet, somewhe...

Why do we love hate-watching certain films and series?

06 Aug 2025

Contributed by Lukas

Frenchie shore, Love Island those are typical examples of shows that people love to hate-watch. The practice has become more and more widespread in r...

Why do we get the post-sex blues?

06 Aug 2025

Contributed by Lukas

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 aroun...

What is xylazine, the so-called zombie drug?

06 Aug 2025

Contributed by Lukas

In July 2023, the White House recognised that the United States was facing a “grave threat” in the form of a highly addictive drug called xylazine...

How can I get the most out of daytime napping?

05 Aug 2025

Contributed by Lukas

Studies have repeatedly shown that human sleep quality is deteriorating year after year, for a number of reasons, including workaholic lifestyles and ...

Why has astrology come back into fashion?

05 Aug 2025

Contributed by Lukas

Have you noticed more of your friends talking about their star signs of late? Maybe they try to guess the sign of people they meet, or come out with u...

What is vitamin D?

05 Aug 2025

Contributed by Lukas

This summer, relax and learn with Do You Really Know! It's time to learn all about the concepts, words and expressions that surround the summer season...

How can heatwaves impact our mental health?

04 Aug 2025

Contributed by Lukas

We’re all aware of the physical risks associated with extreme heat, like dehydration and fainting for example. But a number of scientific studies ha...

What is the ‘adult only’ trend, in public places all about?

04 Aug 2025

Contributed by Lukas

At a time when Europe faces a "baby bust," the role of children in public spaces is sparking new debate. Increasingly, restaurants, hotels, and even t...

Why do our tastes change as we get older?

04 Aug 2025

Contributed by Lukas

Think back to when you were a kid and there was a type of vegetable you simply wouldn’t go near, let alone eat. It might have been broccoli, Brussel...

What is digital sobriety?

03 Aug 2025

Contributed by Lukas

Digital sobriety is all about reducing the ecological footprint of our daily digital lifestyles. That’s right, using your cell phone, PC or connecte...

What makes someone a cat person?

03 Aug 2025

Contributed by Lukas

People often refer to themselves as cat person or dog person, as well as meaning that they prefer this animal to the other, it implies that they iden...

What is a power nap?

03 Aug 2025

Contributed by Lukas

A power nap is a short sleep which is long enough to give an energy boost, but not so long that you enter deep sleep. The term was coined by American ...

Why do we cry?

02 Aug 2025

Contributed by Lukas

Humans are the only creatures on Earth that shed tears. Whether it's tears of joy, laughter, anger, pain, sadness, or fatigue, the emotions that bring...

Why do my eyelids twitch when I’m tired?

02 Aug 2025

Contributed by Lukas

Have you ever noticed how your eyelids tend to start twitching at the end of a long day, or when you haven’t got enough sleep the previous night? ...

Why do some people confuse their left and right?

02 Aug 2025

Contributed by Lukas

Knowing the difference between right and left is crucial for various daily activities like driving and navigation. While most of us take this skill fo...

Can going through a breakup really make us fall sick?

01 Aug 2025

Contributed by Lukas

Restless sleep, a hollow feeling inside and the sting of heartbreak; most of us have been through that kind of ordeal at least once in our lives. Let...

What is London's No Trouser Day?

01 Aug 2025

Contributed by Lukas

You may have seen it on the news, on social media, or even on the tube: hundreds of people riding the underground with no trousers on, in the middle o...

Why do we lose our appetite when we fall in love?

01 Aug 2025

Contributed by Lukas

A lot of things happen to our bodies when we fall in love. Some of the obvious physical reactions are getting butterflies in the stomach, dilated pupi...

What's the best way to choose my toothpaste?

31 Jul 2025

Contributed by Lukas

Choosing the right toothpaste can be a bit of a challenge, either because there's a plethora of options or because you might have specific requirement...

Do anti-anxiety patches really work?

31 Jul 2025

Contributed by Lukas

There are different types of anti-anxiety patches, but one of the most popular ones is from a company called NuCalm, they say that its discs provide ...

What's the right way to burst a pimple?

31 Jul 2025

Contributed by Lukas

If there are any teenagers out there listening in, chances are you have faced an acne breakout at some point in the recent past, or perhaps you're eve...

Resale, repair, rental, refill… could this be the new way to shop?

30 Jul 2025

Contributed by Lukas

November is synonymous with Black Friday, great deals but what cost? Over consumption is endangering our already fragile planet. Is it time to change ...

What should you eat when it’s hot?

30 Jul 2025

Contributed by Lukas

In June 2025, the Met Office announced that the UK had had its warmest spring on record, with a mean temperature of 9.5°C, beating the previous mark ...

What are energy vampires?

30 Jul 2025

Contributed by Lukas

Have you ever noticed how certain people just seem to drain your emotional energy any time you see or speak to them? It could be a work colleague, a f...

Why do some stroke victims wake up with a foreign accent?

29 Jul 2025

Contributed by Lukas

The idea might seem like something out of a fantasy, but “Foreign Accent Syndrome” is a genuine, albeit very rare, neurological condition! It sees...

How could the 52 week method help me save money?

29 Jul 2025

Contributed by Lukas

Let’s be honest; who among us doesn’t daydream about having saving money effortlessly? The new year period is often synonymous with ambitious reso...

Will ATMs disappear?

29 Jul 2025

Contributed by Lukas

The number of free-to-use ATMs in the UK has been steadily declining, with a 6% drop from 2022 to mid-2023. This reflects a shift in consumer habits, ...

How can you keep wasps away?

28 Jul 2025

Contributed by Lukas

They buzz around your fruit salad, hover over your barbecue, and seem to think the edge of your pool is their hangout. Every summer, it’s the same s...

What is the best time of day to take a shower?

28 Jul 2025

Contributed by Lukas

YouGov data from 2019 showed that 49% of Brits shower once per day, while 20% do so 4 to 6 times per week. And 6% even shower more than once per day! ...

What is attachment theory?

28 Jul 2025

Contributed by Lukas

Each of us has our own unique experience of social bonds, influenced by our childhood, previous relationships, and personality. And there’s actually...

Why am I getting bags and circles under my eyes?

27 Jul 2025

Contributed by Lukas

Nobody likes getting up in the morning and looking in the mirror to find dreary bags and circles under their eyes. It can make you look tired and low...

How can I wake up refreshed every morning?

27 Jul 2025

Contributed by Lukas

Some people believe they simply can’t function in the morning until they’ve had a cup of coffee. Others seem to be grumpy every morning, as if the...

Why is male fertility declining so drastically?

27 Jul 2025

Contributed by Lukas

For 30 years, male sperm counts have been declining all around the world, particularly in Western countries. It’s been demonstrated over and over ag...

Does voluntourism do more harm than good?

26 Jul 2025

Contributed by Lukas

Voluntourism is the practice of volunteering one’s labour to a charitable cause in a developing country, in return for a soul-cleansing, perspective...

Do I have poor blood circulation?

26 Jul 2025

Contributed by Lukas

If you’ve got heavy legs, nighttime cramps, varicose veins or swelling in the legs, you may have blood flow issues. When you consider that our bodie...

Can I cure my fear of spiders?

26 Jul 2025

Contributed by Lukas

If just thinking of spiders is enough to make the hairs stand up on the back of your neck, or you jump any time you see one, the chances are you suffe...

Why do I attract mosquitoes more than other people?

25 Jul 2025

Contributed by Lukas

Warm summer nights often bring unwelcome guests into our homes in the form of mosquitoes. For now we fortunately don’t have any mosquito-borne disea...

How can I keep my exercise eco-friendly?

25 Jul 2025

Contributed by Lukas

It's back to school! Do You Really Know is dedicating a special week to sport. Because moving and doing regular physical activity is important for our...

What is sex surrogacy, the controversial sex therapy?

25 Jul 2025

Contributed by Lukas

It may be a little taboo to talk about it, but there are a lot of people out there who, for a variety of reasons, don’t have as much sex as they wou...

Should I quit air travel to save the planet?

24 Jul 2025

Contributed by Lukas

Flying is far from being the most eco-friendly means of transport. Right now it’s responsible for around 2% of global carbon emissions, but that cou...

Why is exercise good for my skin?

24 Jul 2025

Contributed by Lukas

It doesn’t matter which fancy moisturizers or expensive skincare routine you use, nothing quite matches how your skin looks and feels after an inten...

What is space tourism?

23 Jul 2025

Contributed by Lukas

Amazon founder Jeff Bezos stepped down from his position as the company’s CEO to focus on other projects. He’ll remain executive chairman at Amazo...

Why do I have white spots on my nails?

23 Jul 2025

Contributed by Lukas

To understand where white spots come from, we must first explain how nail growth works. If you’ve ever had white spots on your nails before, you ma...

Could summer shading pose a threat to your relationship ?

23 Jul 2025

Contributed by Lukas

Summer is here! The sun’s out; you’ve got a week or two off work and the beach and sea are calling. It’s time to relax, soak up some much-needed...

What is vitamin D?

23 Jul 2025

Contributed by Lukas

This summer, relax and learn with Do You Really Know! It's time to learn all about the concepts, words and expressions that surround the summer season...

What are the best holiday destinations?

22 Jul 2025

Contributed by Lukas

Everyone has their own expectations when it comes to summer holidays. Regardless, you don't necessarily have to travel far to have a good time. At lea...

Is binge drinking over in the UK?

22 Jul 2025

Contributed by Lukas

Binge drinking is defined as consuming 5 or more drinks for a man, or 4 or more drinks for a woman, in about 2 hours, and the UK has a rather notoriou...

How does the "Scully Effect" raise young women's interest in science fields?

22 Jul 2025

Contributed by Lukas

The musical film The Little Mermaid was released in cinemas on 24 May 2023. This movie highlights the importance of representations in the media. This...

Why are you exhausted after a day in the sun?

21 Jul 2025

Contributed by Lukas

You’d think a day spent lounging on the beach would be the ultimate recharge. No deadlines, no emails, just rest and relaxation. And yet, by the tim...

Is feeding birds in your garden a bad idea?

21 Jul 2025

Contributed by Lukas

Leaving food out for the birds seems like a harmless and even generous idea, but research by the British Trust for Ornithology is showing that bird fe...

What is Ramsay-Hunt syndrome, the disorder affecting Justin Bieber?

21 Jul 2025

Contributed by Lukas

In June 2022, Canadian superstar singer Justin Bieber took to Instagram to reveal that he has a rare neurological disorder called Ramsay Hunt Syndrome...

Why does not getting enough sleep make you selfish?

20 Jul 2025

Contributed by Lukas

Not getting a good night’s sleep can certainly leave you feeling grumpy and groggy, but can it also make you selfish? Sleep experts at the Universit...

What is an eco-friendly beach?

20 Jul 2025

Contributed by Lukas

This summer, relax and learn with Do You Really Know! It's time to learn all about the concepts, words and expressions that surround the summer season...

Can our bodies really catch up on lost sleep?

20 Jul 2025

Contributed by Lukas

We talk about sleep needs a lot on Do You Really Know, so regular listeners will be well aware that we need 7-9 hours each day, and that not getting e...

How can I ease my foot pain?

19 Jul 2025

Contributed by Lukas

Feet carry our body weight and bear the impact of every step we take. Furthermore, they play an active role in balance control, thanks to sensors loca...

Could intentional inflexibility help you succeed at work?

19 Jul 2025

Contributed by Lukas

Multitasking, or the art of juggling several tasks at once, is more common than ever before in the workplace. In 2022, a German think tank called Next...

Is Bedrotting bad for your health?

19 Jul 2025

Contributed by Lukas

Whether it’s reading, journaling, enjoying breakfast, or scrolling through social media, these are just a few activities people indulge in while lou...

Why do men always take care of the barbecue?

18 Jul 2025

Contributed by Lukas

Every summer, the pattern repeats itself: the drinks are flowing, the atmosphere is relaxed but as soon as it’s time to light the grill, men gravita...

Why do people get angry when they drive?

18 Jul 2025

Contributed by Lukas

According to Compare the Market research from November 2023, 69.5% of UK drivers say they experience road rage, with 12% admitting it happens to them ...

What are the world's least safe travel destinations?

18 Jul 2025

Contributed by Lukas

In past episodes of Do You Really Know, we’ve talked about the best holiday destinations in the UK and abroad, as well as how to find the most budge...

What are mirror hours?

17 Jul 2025

Contributed by Lukas

Ever checked the time on your phone or TV set and seen a quirky number like 13:13, 11:11 or 20:20? Well of course you have, but what you may not know ...

How long do I have to wait to swim after eating?

17 Jul 2025

Contributed by Lukas

I’m sure at some point as a child on holiday you were told not to go swimming right after eating. Popular belief suggests that we should wait a cert...

How do pheromones affect our sexuality?

17 Jul 2025

Contributed by Lukas

Have you ever seen perfumes advertised as containing pheromones and therefore increasing your sexual attractiveness or libido? Sounds too good to be t...

What are the best ways to have sex in water?

16 Jul 2025

Contributed by Lukas

Having sex in water is a common fantasy for a lot of people. We’re talking about in the sea, in a jacuzzi or in a swimming pool for example. A lot o...

Do I really need to flush toxins out of my body?

16 Jul 2025

Contributed by Lukas

There are an increasing number of trends and products out there to rid your body of toxins, such as infrared saunas, liver-purifying supplements and ...

Why is laughing contagious?

16 Jul 2025

Contributed by Lukas

Have you ever found yourself laughing at a completely inappropriate moment? If so, you know just how embarrassing it can be. And it gets even worse wh...

Who are digital nomads, the new generation of remote workers?

15 Jul 2025

Contributed by Lukas

Since the first COVID-19 lockdowns in 2020, remote work has become commonplace in companies around the world. Working from home offers many advantages...

What are yellow flags in dating?

15 Jul 2025

Contributed by Lukas

In recent years, dating has become a lot more structured. Terms like "green flags" and "red flags" are now part of everyday language, and the criteria...

What’s the worst kind of meat for the environment?

15 Jul 2025

Contributed by Lukas

According to The Telegraph, Brits eat an average of 220g of meat per day, which is almost double the global average. And agriculture is responsible fo...

What's the ideal temperature to stay healthy at home?

14 Jul 2025

Contributed by Lukas

The World Health Organisation suggests that 18° C is the perfect temperature to set your heating to, but in reality that is just an average. There ar...

Are you spending more on groceries due to stretchflation?

14 Jul 2025

Contributed by Lukas

The subject of today’s episode is the latest questionable practice in retail. "Stretchflation" is getting a lot of attention, and for good reason: i...