Science

WTF Fun Fact 13441 – Dopamine Reward Prediction Error

The concept of the dopamine reward prediction error is important for understanding the roots of learning, motivation, and even addiction. It’s all about how our brains respond to rewards (and how we get bored with the same reward over time).

What’s the point of dopamine?

Dopamine is a neurotransmitter (or “chemical messenger”) that plays a role in our brains’ reward system. In other words, it’s the star of the show when it comes to feelings of pleasure and satisfaction.

Think about how you feel when you sit down to your favorite meal. Or approach the counter with a long-sought item you saved up money to buy. Happy times! Right?

Well, one particularly interesting (and, frankly, kind of unfair) element of how dopamine functions is that once we already know what a reward will feel like, our brains don’t send out as much dopamine. This is the concept of the dopamine reward prediction error.

What is the dopamine reward prediction error?

Let’s dive a little deeper.

Imagine you’re at a new restaurant for the first time. You order a dish you’ve never tried before. To your pleasant surprise, it turns out to be delicious. Your brain rewards you with a burst of dopamine, creating a sense of pleasure and satisfaction. In essence, your brain is saying, “Good job! Let’s remember this for next time.”

Now, let’s fast-forward to your next visit to the same restaurant. You order the same dish, this time expecting it to be tasty. But here’s the catch – when you take the first bite, your brain’s dopamine release is less intense than the first time. This is because the pleasure derived from the meal was expected. This concept is known as reward prediction error.

Even when you’re eating your favorite meal, it may never taste as marvelous as the first time you had it.

What’s going on in the brain when there’s a dopamine reward prediction error?

Reward prediction error is your brain’s way of comparing the predicted reward (expectation) with the actual outcome. When reality exceeds your expectations, a positive prediction error occurs. And your brain increases its dopamine release.

Conversely, when the actual reward is less than expected (as so often happens in life!), a negative prediction error occurs. Few things are as good as we imagine them to be, and this results in a decrease in dopamine release. (Why did our brains stop playing nice?!)

Why is your brain being a jerk about dopamine?

This dopamine release mechanism seems to play a role in how we adjust our predictions based on outcomes. Technically, it helps us learn from our mistakes and successes. But clearly, it’s not all fun and games. Your brain doesn’t give you a trophy every time you do something good (at least not a big one).

This dopamine-driven learning process can be exploited in harmful ways too. Just think about addiction.

Some drugs generate a significant positive prediction error in our brains. In other words, we take them and (if we survive) we may get a massive release of dopamine that makes us feel great. But this tricks the brain into overvaluing the substance. And this can drive intense cravings and compulsive behavior.

The down side of dopamine

Whether it’s drugs or food or destructive behavior, repeated exposure leads to a decrease in the dopamine response. Unfortunately, this means our bodies require more of the substance to achieve the same effect. That’s addiction.

But here’s the good news – understanding the way our brains respond to reward prediction errors can open up possibilities for new therapeutic approaches. It is helping researchers develop interventions that ‘retrain’ the brain’s reward system to reduce the impact of negative prediction errors and boost our ability to learn from positive experiences.

— WTF fun facts

Source: “Dopamine reward prediction error coding” — Dialogues in Clinical Neuroscience

WTF Fun Fact 13439 – The Dog Days of Summer Explained


Does the phrase “Dog Days of Summer” conjure images of lethargic canines lazing in the heat? Well, the origins of this term reach far beyond our four-legged friends and into space.

What are the dog days of summer?

Ok, technically, it does have to do with a dog – Sirius, the Dog Star. Sirius is part of the constellation Canis Major, and it’s the brightest star in the Earth’s night sky.

The term “Dog Days” stems from the ancients, both Greeks and Romans, who noticed the coincidence of the hottest time of the year with the period when Sirius rose and set with the Sun. They hypothesized that the added radiance of Sirius was the cause of the intensified summer heat. Thus the phrase “Dog Days” in reference to Sirius’s constellation.

But the “Dog Days” are more than just a celestial phenomenon and a synonym for summer swelter. They have cultural and historical significance dating back thousands of years. The Greeks, for instance, saw the period as a time of potential disaster, heralding fever, catastrophe, and even the downfall of empires.

Wobbling dog days

Fast forward to the present, and the “Dog Days” still persist in our lexicon. However, due to a phenomenon called precession (the slow wobble of Earth’s rotational axis), the dates during which Sirius rises and sets with the Sun have slowly shifted over centuries. Yet, the phrase “Dog Days” remains tethered to the heart of the summer. It’s recognized in the Northern Hemisphere primarily from July 3 to August 11.

The warmest days of summer, those long afternoons that stretch languidly towards the evening, are connected to a distant cosmic spectacle occurring about 8.6 light-years away. That is the beauty of astronomy and the power of human observation, linking us to the stars and the seasons in unexpected ways.

So, next time you’re feeling the heat of summer bearing down, spare a thought for Sirius and its ancient connection to these sultry days. The “Dog Days” are a cosmic link, a reminder that even on the hottest days of summer, we are all under the same sky.

— WTF fun facts

Source: “Stars and canines collide in ‘dog days’” — Christian Science Monitor

WTF Fun Fact 13438 – Killer Whales are Dolphins

Here’s a bit of trivia that might just turn your marine world upside down: killer whales, also known as orcas, aren’t whales. They’re actually the largest dolphins in the sea! That’s right, Shamu, the poster child for what we envision when we think of whales, is really more Flipper than Moby Dick.

Are orcas whales or dolphins?

Orcas, known for their black bodies, striking white patches, and formidable size, are a sight to behold. However, despite their common name – killer “whale” – these majestic creatures are more closely related to their smaller, playful dolphin cousins.

Now, this might seem like a marine biologist trying to mess with you, but it’s all in the scientific classification. Orcas are part of the oceanic dolphin family, known as Delphinidae, which includes other well-known species like the bottlenose dolphin and the common dolphin. Essentially, all killer whales are dolphins, but not all dolphins are killer whales.

In fact, the orca’s scientific name, Orcinus orca, loosely translates to ‘demon from hell’, a nod to their reputation as fierce hunters. But don’t let the ominous name scare you, these creatures are incredibly intelligent and social.

Orcas, like their dolphin relatives, are known for their intelligence and complex social structures. They live in tight-knit groups known as pods, led by a matriarch, often the oldest female. Within these pods, they communicate using a series of clicks, whistles, and body movements.

What’s fascinating about orcas is that different pods can have different cultures, dialects, hunting techniques, and even dietary preferences. This level of cultural diversity is virtually unheard of outside of human societies, further cementing their place in the pantheon of intelligent life on Earth.

Classifying creatures

However, their classification as dolphins doesn’t make them any less ‘killer’. They are apex predators, the top of the food chain, preying on seals, fish, squid, and even other whales. Their name, ‘killer whale’, is actually a bit of a misnomer. It originates from the term ‘whale killer’, coined by sailors who observed these dolphins attacking larger whales.

Despite being top predators, orcas face a host of challenges in the modern world, ranging from pollution and loss of prey to climate change and captivity. Our understanding of orcas, their behaviors, and their needs, is crucial for their protection.

Perhaps one of the best ways we can appreciate orcas is to realize that they’re not so different from us. They’re intelligent, they’re social, they’re diverse, and they’re vulnerable. They’re dolphins that have adapted to their environment in remarkable ways, rising to the top of the oceanic food chain.

So next time you hear the term “killer whale”, remember, these magnificent creatures are actually the ocean’s largest dolphins. Just another example of how the natural world continues to surprise and inspire us!

— WTF fun facts

Source: “Is an orca (killer whale) a whale or a dolphin?” — WDC

WTF Fun Fact 13437 – Nuclear Pasta

Luckily, nuclear pasta is not coming to a dinner plate near you.

Imagine the densest material in the universe. It’s far harder than a diamond. In fact, this stuff is ten billion times stronger. Nestled in the heart of a neutron star, there’s a material that goes by the name: nuclear pasta.

Why is it called nuclear pasta?

Welcome to the most outlandish, mind-boggling part of astrophysics. Neutron stars, the remnants of massive stars that exploded as supernovae, pack twice the mass of our sun into a sphere just 20 kilometers in diameter. As a result, these objects have some truly wild properties.

If you were to dig into the heart of a neutron star, you’d see layers of complexity. As you delve deeper, things get denser and denser. Around halfway to the center, the density of the material becomes so great that the atomic nuclei become squished into a variety of shapes. Scientists believe they resemble pasta types, hence the nickname.

But what makes this stuff special?

According to research, these are likely the densest and hardest substances in the universe. In fact, one sugar cube of nuclear pasta would weigh as much as a mountain.

Theoretical physicists and astrophysicists have been trying to simulate nuclear pasta to better understand its properties. According to a 2018 study, nuclear pasta may be the strongest material in the universe. It’s not only incredibly dense but also has a shearing resistance tougher than steel’s.

This immense density results in intense gravitational fields, causing the pasta shapes to align themselves into an incredibly tight lattice structure. This structure could play a crucial role in various neutron star phenomena, including starquakes, glitches, and even gravitational waves.

Interestingly, nuclear pasta doesn’t exist naturally on Earth, and for a good reason – it’s way too dense and strong for our environment. But the fact that it exists in the universe opens up a whole new realm of physics.

Discovering the existence of nuclear pasta is also vital for understanding neutron stars better. These stars are not only fascinating in their own right but also play a crucial role in the life cycles of galaxies. Understanding more about neutron stars could, therefore, lead to insights about how galaxies, including our own Milky Way, evolve over time.

There’s still so much to learn about neutron stars. But one thing’s for sure – the universe is full of fantastic and surprising structures!

— WTF fun facts

Source: “What is nuclear pasta?” — BBC Sky at Night Magazine

WTF Fun Fact 13436 – Vertical Forests

Do you know about the urban jungles called vertical forests? These towers of lush greenery stretch skyward, a testament to man’s ingenuity and nature’s adaptability.

The original vertical forest – Bosco Verticale

Vertical forests stem from the inventive mind of Italian architect Stefano Boeri. His vision for a greener planet led to the creation of Bosco Verticale, a pair of residential towers in Milan. These living, breathing structures showcase over 900 trees, 5,000 shrubs, and 11,000 floral plants. The foliage acts as an urban lung, absorbing carbon dioxide and pumping out oxygen, offering a breath of fresh air in a bustling metropolis.

Vertical forests in Asia

Hot on Milan’s heels, Nanjing, China, unveiled its vertical forest concept in 2018. Nanjing Green Towers mirror their Italian counterparts, cocooning a hotel, office, museum, school, and a rooftop club in a verdant embrace. Greenery cloaks the buildings, forming a dynamic ecosystem that provides shade, reduces noise pollution, and creates a habitat for birds and insects.

Across the globe in Ho Chi Minh City, Vietnam, Vo Trong Nghia Architects has a vision. With the city’s greenspace dwindling, they proposed a series of condominiums swathed in bamboo-filled concrete planters. They’ve named it the “House for Trees,” with each building designed to accommodate a tree on its roof.

A burgeoning trend

But, vertical forests aren’t solely for the concrete giants of the world. Medium-sized cities have jumped on the bandwagon too, with Eindhoven, a quaint city in the Netherlands, unveiling its own verdant vision. Trudo Vertical Forest is an affordable housing project designed to provide low-income families with sustainable homes wrapped in the embrace of 125 mature trees and countless shrubs.

In Quito, Ecuador, the urban jungle takes a different form. The IQON is Latin America’s first vertical forest, with plans to feature over 300 tree species, some of which are in danger of extinction. It’s an ambitious project, and one that aims to reconcile the city with its biodiverse surroundings.

Finally, let’s take a trip to the desert. In the heart of Egypt’s New Administrative Capital, Stefano Boeri strikes again. He proposes a series of seven vertical forest buildings and three green residential complexes. The design aims to combat desertification while creating a bio-diverse urban ecosystem.

These are just a few examples of the burgeoning trend of vertical forests, a unique solution to urbanization’s challenges. As the world’s cities continue to expand, it’s this kind of innovative, nature-centric architecture that will help keep our urban environments breathable, sustainable, and beautiful.

— WTF fun facts

Source: “9 Vertical Forests Around the World That Look like Jungles in the City” — Interesting Engineering

WTF Fun Fact 13429 – Crown Shyness in Trees

Have you ever seen a tree get nervous? Certainly not, but crown shyness in trees is about to give you a whole new perspective.

Imagine wandering through a dense forest, the quiet whispers of leaves your only company. You gaze upward, finding yourself under a vast, living canopy. Now, observe the leaves’ formation. Notice how each leaf reaches out for its share of sunlight, yet mysteriously avoids overlapping with its neighbor. This intriguing behavior is known as crown shyness.

Crown shyness is a botanical phenomenon where trees of the same species (and sometimes, different species) avoid touching one another. The resulting gaps in the canopy form a stark, jigsaw-like pattern against the sky—a natural artwork of lines and spaces, fascinating and beautiful.

What causes crowd shyness in trees?

The exact cause of crown shyness remains a subject of debate among scientists. Some theories propose that it’s a mechanism to prevent the spread of harmful insects or diseases. Others suggest it’s due to the trees’ sensitivity to physical contact. When branches collide due to wind, they could sustain damage, leading to a phenomenon known as ‘branch abrasion.’ Over time, the trees might “learn” to avoid contact, hence the “shyness.”

But whatever the cause, the consequences of crown shyness on forest ecosystems are tangible. The patterns it creates reduce competition for sunlight, enabling all trees to flourish. Moreover, the resulting gaps in the canopy permit more rainfall to reach the forest floor, benefitting the undergrowth.

Even though we attribute the term “shyness” to this phenomenon, the reality is anything but timid. It’s a fierce competition for survival and a demonstration of cooperative living in the wild. It’s a reminder that trees, though stationary and silent, engage in complex interactions with each other.

The more we know the less we understand

By observing and understanding these unique patterns, we gain insights into the interconnectedness of nature. We comprehend how trees, despite being rooted to the spot, communicate and interact with their environment in ways beyond our understanding.

In our fast-paced world, a moment spent contemplating the “shyness” of the trees can instill a deeper respect for the complexity and subtlety of nature. As we walk under the forest’s green canopy, we’re participating in a delicate dance that’s been choreographed over millennia. A dance where each participant knows their place and respects the other, a dance of survival, adaptation, and above all, cooperation.

So, the next time you wander into a forest, look up. Witness the marvel of crown shyness. You’re not merely observing a scientific phenomenon; you’re peering into an intricate world that continues to inspire, educate, and mesmerize us.

— WTF fun facts

Source: “Some trees may ‘social distance’ to avoid disease” — National Geographic

WTF Fun Fact 13423 – Egyptian New Year

Ancient Egyptian New Year took place right after the summer solstice. But it’s all because of the stars.

How did the ancient Egyptian New Year work?

In ancient Egypt, a star took center stage in the night sky right after the summer solstice. Not just any star, but Sirius, the brightest in our galaxy. Its annual appearance sparked a series of critical events. The Nile River would flood, replenishing the arid land with fresh, fertile soil. An agricultural resurgence followed, as did the beginning of a new year in the Egyptian calendar. That’s why Sirius was also referred to as the “Nile Star.”

New beginnings

So, what was the connection between the summer solstice, Sirius, and the Nile’s annual flooding? Each event seemed to occur in a synchronized manner. The solstice, marking the longest day of the year, was like the opening act. It was the signal, the green light, that Sirius was about to make its grand appearance.

Soon after the solstice, just as the Earth began its tilt away from the sun, Sirius would rise above the eastern horizon. The Egyptians saw this as no coincidence. In their view, Sirius had a profound influence on the Earth. It controlled the ebbs and flows of the mighty Nile.

In essence, the Egyptians saw the world around them as a mirror of the cosmos. Everything was interconnected. The rise of Sirius, the flooding of the Nile, the abundance of crops – these were not isolated events but part of a grand, divine plan. They believed Sirius triggered the Nile flood. The life-bringing waters were a celestial gift, ushering in a season of fertility and growth.

Following the cosmos

With the rise of Sirius linked to such an essential natural event, it’s no surprise the Egyptians incorporated it into their calendar. The Egyptian New Year was not only a temporal marker but a time of celebration, renewal, and anticipation for the bountiful harvest that lay ahead.

The fascinating link between Sirius, the summer solstice, and the flooding of the Nile demonstrates the Egyptians’ profound understanding of astronomy and its influence on their environment. They recognized patterns, made predictions, and used this knowledge to their advantage.

And this is yet another reminder that calendars do not arbitrarily mark time but are instead rooted in the significant events of their world.

— WTF fun facts

Source: “SUMMER SOLSTICE: 3 HISTORICAL LOCATIONS THAT MARK THE ORIGINAL HOLIDAY” — Inverse

WTF Fun Fact 13419 – The Train Fueled by Ramen

Buckle up because we’re taking a train ride fueled by ramen. Yes, the noodly food with the broth that can’t be beat.

The magic of ramen

It turns out that the magic of ramen in Japan extends beyond the bowl. Japan’s love affair with ramen has led to an invention that’s a perfect fusion of ingenuity and sustainability: the ramen-fueled train.

In Japan’s Miyazaki Prefecture, there’s a popular sightseeing train on the Amaterasu Railway. It takes you through scenic landscapes in style. And it runs on an unexpected sustainable fuel source: leftover ramen oil!

Yes, you read it right – the waste oil from ramen noodles is now a green energy source.

How does a train fueled by ramen work?

So, how does a bowl of ramen morph into train fuel?

According to Mental Floss (cited below) reporting from My Modern Met:

“As of the latter half of 2022, it runs on tonkotsu ramen broth salvaged from local restaurants. A Japanese trucking company called Nishida Logistics extracts pork fat from the stock and refines it; it’s then mixed with old oils used to fry foods like tempura. The final formula consists of 90 percent cooking oil and 10 percent ramen broth lard.”

Ramen as fuel for green energy

Now, let’s shine the spotlight on the ecological benefits of this ramen revolution. Every liter of biodiesel reduces CO2 emissions by approximately 2.5 kg compared to regular diesel. In one year, the train is estimated to utilize around 21,000 liters of biodiesel. It’s not just a drop in the ocean. It’s a significant leap towards carbon neutrality.

But, the benefits of this initiative extend beyond reducing carbon footprints. By utilizing waste oil, it helps reduce disposal costs and risks associated with waste oil. Simultaneously, it offers an additional income stream to ramen shops that otherwise would have to pay to dispose of the excess oil.

Another noteworthy facet of this project is its community involvement. The biodiesel is sourced from local ramen shops, promoting a sense of community participation in sustainable practices.

Ramen power

While the ramen-fueled train is a unique case, it represents a broader shift towards sustainable energy sources in transportation. The ingenuity of using a readily available waste product showcases the limitless possibilities for sustainable energy.

From a bowl of ramen to the sweeping landscapes of the town of Takachiho, the journey of this energy-efficient train tells a tale of environmental stewardship. The ramen-fueled train is not just a sightseeing marvel; it stands as a testament to Japan’s pioneering spirit in tackling environmental challenges head-on.

So, the next time you find yourself in Japan, relishing a bowl of delicious ramen, remember – you’re not just feeding your stomach, but also fuelling a greener future. Now, that’s food for thought!

— WTF fun facts

Source: “This Tourist Train in Japan Is Fueled By Salvaged Ramen Broth” — Mental Floss

WTF Fun Fact 13416 – Blood Falls Antarctica

Blood Falls Antarctica is a frozen waterfall, cascading five stories from the ice, gushing forth not crystal-clear water but an arresting, vivid red liquid.

So, what’s the backstory of Blood Falls Antarctica?

It’s a tale woven from the threads of geology, microbiology, and chemistry, spun over millennia. Blood Falls gets its name and dramatic hue from iron-rich brine, trapped under Taylor Glacier over two million years ago.

The secrets of the falls stayed locked away until the brine found a fissure through which to burst forth. And here’s the fun part – the iron in the water, upon exposure to air, undergoes a reaction. It rusts! Just like an old garden rake left out in the rain, the liquid takes on a startlingly bright, rusty red hue. Hence, the startling crimson cascade that is Blood Falls.

It’s alive!

But the story doesn’t end there. Hidden beneath the glacier, in the depths of the briny reservoir, researchers discovered something utterly mind-blowing. Microbes! Yes, you read that right – in an environment devoid of light and oxygen, where temperatures can dip well below freezing, life has found a way.

These extremophile microbes feast on sulfates in the water, metabolizing them into energy. Aha! Now we’re cooking! These minuscule organisms offer fascinating insights into life’s tenacity, its sheer refusal to go gentle into that good night. They show us the stunning adaptability of life and provide tantalizing possibilities about life existing in similar conditions on other planets. Mars, anyone?

A unique tourist destination

Now, you might think that with its vivid, gory spectacle and a location as remote as Antarctica, Blood Falls would be off the radar for most people. But you’d be mistaken. This extraordinary waterfall has become a focal point for scientists and a bucket list destination for adventure tourists seeking experiences far from the beaten path. Imagine the selfies!

It’s a testament to nature’s ingenuity and never-ending capacity to surprise and inspire us. From the moment geologist Griffith Taylor discovered it in 1911, Blood Falls has been a thing of grim beauty and scientific wonder. It stands there today, a riveting red river flowing from a glacier’s heart, a symbol of the mysteries that still lie tucked away in Earth’s farthest corners, waiting for us to uncover them.

— WTF fun facts

Source: “Blood Falls in Antarctica, what makes them red?” — EarthSky