10 Curiosities You Probably Didn’t Learn in Biology Class

The world is a big, wonderful place full of facts we never thought possible. For instance, if a pregnant mouse has a sudden medical issue, the fetus will send stem cells to heal the mother, increasing its chances of survival as well. Fetal stem cells have been found in human mothers as well, dubbed by science as microchimerism.

Bright Side dug up some more marvelous facts about nature and its creations, upholding our yearly resolutions to spread knowledge and joy.

1. The heart slows when your face touches water.

As mammals, we can’t breathe underwater, so as part of the mammalian dive reflex, our heart rate goes down in the water — more so if we go underwater. Even splashing the face with water makes the heart slow down, making it a great way to calm down.

2. Fungus can break down plastic in weeks.

It is said that in the future, there may be more plastic in the ocean than fish. This is why the plastic-eating fungus is great news, and there are around 50 new species of such fungi discovered already. One of the fungi discovered can digest plastic within 2 months, so there’s hope for us yet.

3. Newborn babies can support their own weight.

Newborn babies are strong — strong enough to be able to grasp things in their tiny fists and even support their weight as shown by an experiment done in the nineteenth centuryLouis Robinson witnessed babies able to hang from a walking stick, from 10 seconds to 2 minutes and 35 seconds.

4. Koala fingerprints have been mistaken for human ones.

We’ve been told that our fingerprints are unique, and they are. But the fact remains that even though we share a common ancestor with the koala that was alive 100 million years ago, koala fingerprints look very similar to human fingerprints, as do chimpanzee fingerprints for that matter.

5. Snails can sleep for 3 years.

If you thought bears had it good with hibernation, meet the snail. Snails can sleep rather than hibernate for 3 years at a time without needing food. Of course, this is with some snail species, not all of them. Meanwhile, bears usually hibernate for just 4-8 months.

6. Sloths need 2 weeks to digest food.

Sloths don’t only move in slow motion — even their insides move slowly, ostensibly to preserve energy, which is why a sloth’s digestive system takes 2 weeks to process the food it ate. Plus, most of what it eats is indigestible, giving it very little energy from each slowly chewed mouthful.

On the other end of the spectrum lies the shrew, whose digestion takes mere minutes and is done so fast, not much of it is fully digested. This is the reason why shrews eat their own feces. They can die of starvation in a matter of hours if they don’t eat.

7. Your brain ignores seeing your nose.

We can see our nose all the time, it’s just that the brain tends to ignore it because it’s a constant visual stimulus. It’s the same with people who wear glasses. After a while, they simply stop noticing them.

8. Your forearm is the same length as your foot.

If you don’t have the time to try on a shoe, measure it from your elbow crease to your wrist. If it fits or is just a little smaller, it would fit your foot because the length of your forearm is the same as your foot. And this is just one of many human body ratios that are a marvel in themselves, including the fact that your femur bone is one-quarter your height.

9. You can “see” your white blood cells.

If you look up at a cloudless, bright blue sky and see some wiggly things at the periphery of your vision, you’ve just experienced the blue field entoptic phenomenon. The wiggly things are white blood cells moving in the fine blood vessels moving in front of the retina, at the back of the eye.

10. Human beings have striped skin, but only cats can see it.

Human beings have stripes and patterns on the skin too, and they are called Lines of Blaschko, name eponymously by the scientist who discovered them, Dr. Alfred Blaschko. These are closer to tiger stripes, forming more of a V-pattern fanning out from the center to the extremities. These lines are visible under UV light, a spectrum that cats can see too, which is why cats can see you as a striped being as well.

Which of these facts turned out to be a revelation for you? Share your extreme nature facts with us and blow us away.

Preview photo credit Shutterstock.comShutterstock.com

Compilation of Uplifting Tales Guaranteed to Brighten Your Entire Day

Three individuals find their lives unexpectedly intertwined with hope. From a boy’s simple lemonade stand to a grandmother’s heartfelt gift, discover how moments of kindness and determination can lead to life-changing outcomes.

Life’s most profound changes often begin with the smallest of actions—a gesture of kindness, a long-forgotten memory, or a simple dream pursued with determination. These three stories explore how ordinary moments can ignite extraordinary transformations, leaving us with a renewed sense of hope and a reminder that even in the darkest times, light can be found.

Lost and Found: Max’s Journey Home
Max had been living on the streets for as long as he could remember, which wasn’t very long at all. His past was a blur, a fog he couldn’t see through.

All he had was the present: the cold pavement beneath him, the hum of the city, and the mysterious tattoo on his hand—a small emblem with intricate lines that felt familiar, yet distant. It was the only clue to a life he had lost.

Despite his circumstances, Max never gave up. Every day, he roamed different neighborhoods, asking if anyone had small jobs he could do. He wasn’t looking for charity—he wanted to work. “Anything you need done? A small job, just for a meal,” he’d ask.

Some people ignored him, others turned him away, but a few, seeing the sincerity in his eyes, would offer him tasks like sweeping a storefront or carrying groceries.

With the few dollars he earned, Max bought clean clothes from thrift shops. Every Sunday, he made sure he looked presentable enough to attend church. It wasn’t just about fitting in; it was about his faith. He held onto it like a lifeline, believing that God hadn’t forgotten him.

And then, one Sunday, something remarkable happened.

Max stood near the back of the church, head bowed in reverence. The priest was just beginning the service when a man, tall and dressed in a sharp black suit, walked in.

The man noticed Max almost immediately, his eyes drawn to the tattoo on Max’s hand, which rested lightly on the pew.

The man’s eyes widened in shock. He quickly rolled up his sleeve, revealing an identical tattoo on his own wrist. Without hesitation, he strode toward Max, his steps quickening as realization dawned on him.

“Max? Is that really you?” the man asked, his voice tinged with disbelief.

Max looked up, confusion crossing his weathered face. “Do I know you?” he replied cautiously.

The man smiled, a tear slipping down his cheek. “Max, it’s me, Patrick! We went to school together—St. Francis Academy. Remember? We got these tattoos as a pact, promising we’d always stay friends.”

Max blinked, the name triggering a distant, flickering light in the fog of his mind. “Patrick…”

Patrick nodded, his smile growing wider. “That’s right! You and I were like brothers back then. What happened to you? We lost touch after graduation, and I never heard from you again.”

Max shook his head slowly. “I don’t remember much. I woke up one day, and everything was gone—my memory, my life. All I had was this tattoo.”

Patrick placed a hand on Max’s shoulder, his voice filled with determination. “Well, that ends today. You’re coming with me. We’re going to get you back on your feet.”

Max hesitated, looking down at his ragged clothes. “I’m not sure, Patrick… I’ve been like this for so long. I wouldn’t know where to start.”

Patrick’s laugh was warm and reassuring. “Start by coming home with me. You’ll stay at my place until we figure this out. And don’t worry about anything else. My company could use someone with your work ethic. We’ll find a role for you.”

For the first time in years, Max felt a spark of hope. “You’d do that for me?”

Patrick nodded firmly. “Of course, Max. You’re not just a friend, you’re family.”

After the service, Max stood up, still a bit shaky, as Patrick guided him out of the church. Back at Patrick’s apartment, Max was overwhelmed by the warmth and comfort, the soft carpet, and the smell of fresh coffee.

Patrick handed him a fresh set of clothes. “Take a shower, get cleaned up,” he urged. “Tomorrow, we’ll get you a doctor’s appointment and figure out what’s going on with your memory.”

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