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

I Found a Decades-Old Christmas Gift Inside the Walls of My Late Parents’ House While Renovating – When I Opened It, I Went Pale

While renovating her late parents’ home, Janet discovers a decades-old Christmas gift hidden in the kitchen wall with her name on it! Inside, a VHS tape bears the chilling note: “This will change your life.” Watching the tape reveals a family secret that turns her world upside down.

I stood in what used to be my parents’ kitchen, a dust mask hanging around my neck, when the sledgehammer hit something that didn’t sound right.

A sledgehammer and broken drywall | Source: Midjourney

A sledgehammer and broken drywall | Source: Midjourney

The hollow thunk made me pause. Mom and Dad had lived in this house for 40 years before passing within months of each other, and now here I was, trying to turn their dated kitchen into something I could love.

The renovation project had started as a way to finally move past my grief. Two years had passed since my parents’ deaths, but every swing of the hammer felt like I was dismantling memories along with the old cabinets.

“That’s weird,” I muttered, lowering the sledgehammer.

A woman looking at a hole in the drywall | Source: Midjourney

A woman looking at a hole in the drywall | Source: Midjourney

The drywall crumbled away to reveal something that definitely wasn’t a stud or pipe.

Fragments of yellowed plaster scattered across my work boots as I reached in and pulled out a package wrapped in faded Christmas paper, covered in dancing snowmen that had long since lost their cheerful gleam. The paper was brittle, threatening to disintegrate under my touch.

My heart skipped when I saw my name, “Janet,” written in Mom’s flowing script.

An old, dusty Christmas gift | Source: Midjourney

An old, dusty Christmas gift | Source: Midjourney

The paper crackled under my fingers as I turned it over, trying to guess how long it had been hidden there.

The edges were soft with age, corners rounded from years pressed against unforgiving drywall. I scratched at one taped corner of the wrapping and the packaging tore apart, practically unwrapping itself.

The first thing I saw was a note that made my hands shake: This will change your life.

A woman holding a note | Source: Midjourney

A woman holding a note | Source: Midjourney

It was Mom’s handwriting again. Beneath the note was a VHS tape. I lifted it, turning it over in my hands.

“This was meant for me…” I muttered. “I have to know what’s on it.”

I rushed down to the basement. As I worked through the renovations, I’d stored anything useful down there so it would be out of my way, including my old TV with the built-in VCR player. I quickly found it in the corner and carried it upstairs to the living room.

An old TV on a floor | Source: Pexels

An old TV on a floor | Source: Pexels

The tape clicked into place, and the screen flickered to life. A small boy with bright eyes appeared, maybe seven or eight years old, reciting a poem I didn’t recognize. His smile was infectious, his whole face lighting up as he performed.

Then the image changed and I gasped. Mom and Dad, looking so much younger, sitting on our old floral couch. Mom’s hair was still completely brown, Dad still had his mustache. I’d forgotten how handsome he’d been.

“My darling Janet,” Mom began, her voice cracking. “There’s something we need to tell you.”

A woman on a sofa looking at something | Source: Midjourney

A woman on a sofa looking at something | Source: Midjourney

“Something we should have told you long ago.” She twisted her wedding ring nervously. “We just didn’t know how…”

Dad reached for her hand before speaking to the camera. “You were born with a heart defect, sweetie. A serious one. The doctors…” He swallowed hard. “They didn’t think you’d make it. Those first years were… we almost lost you so many times.”

“But then a miracle happened,” Mom continued, tears glistening in her eyes.

A woman staring in shock | Source: Midjourney

A woman staring in shock | Source: Midjourney

“The boy you watched at the beginning of this video… his name is Adam. He passed away unexpectedly and his family donated his organs. Janet, his heart beats in your chest. In their darkest moment, Adam’s family gave us the greatest gift imaginable: a future with you.”

I pressed my hand to my chest, feeling the long scar my parents told me was caused by a bad playground accident when I was a toddler, and the steady thump beneath my ribs.

Adam’s heart. Adam’s heart. All these years, I’d carried this piece of someone else’s story without knowing it. The scar had been there all this time, but I’d simply accepted my parents’ explanation.

A shocked and sad woman on a sofa | Source: Midjourney

A shocked and sad woman on a sofa | Source: Midjourney

“You were too young to remember the surgery,” Dad explained. “We wanted to tell you so many times but it never felt like the right time, so we decided to give you this tape to explain everything.”

“We hope you’ll remember Adam and honor his memory. You became our Christmas miracle because of him.”

The video ended, and I was left sitting there, staring at the screen in disbelief. My body felt like it was floating, disconnected from everything around me.

A woman on a sofa reeling from shock | Source: Midjourney

A woman on a sofa reeling from shock | Source: Midjourney

Eventually, I snapped out of shock, pulled out my phone, and called Lisa. My older sister had always been my first call in moments of crisis, real or imagined.

“Hey sis, I… I just found something hidden in the wall in Mom and Dad’s house,” I said.

“Please tell me it’s not black mold,” Lisa replied. “Or mice. Remember that nest we found in the attic when we were kids?”

“It’s nothing like that. It’s… a Christmas present. A VHS tape. Lisa, I don’t understand what I’ve just seen. Did I get a heart transplant when I was a kid?”

A woman speaking on her cell phone | Source: Midjourney

A woman speaking on her cell phone | Source: Midjourney

“Oh my God,” Lisa breathed over the phone. “You found it… stay right there, I’m coming over right now.”

Lisa hung up before I could ask anything more. I watched the video again and around 15 minutes later, the front door burst open and Lisa rushed in. The first thing she did was pull me into a tight hug.

“I’m so sorry, Janet. I should’ve told you, but… after everything that happened…”

“So, you knew about this? All this time?” I whispered.

A distraught woman looking at someone | Source: Midjourney

A distraught woman looking at someone | Source: Midjourney

Lisa sank onto the couch beside me, her shoulders slumping. “I was twelve when it happened. I remember sitting in the hospital waiting room with Grandma, praying harder than I’d ever prayed before. That’s the real reason why you need those pills you take, they prevent your body from rejecting the donor heart.”

My jaw dropped. Mom and Dad told me those pills were for an entirely different health issue.

A woman glancing to one side with a shocked expression | Source: Midjourney

A woman glancing to one side with a shocked expression | Source: Midjourney

Yet another clue that had been in front of me all this time, another lie I’d never questioned.

She took a shaky breath as she looked at Mom and Dad, frozen on the TV screen. “Mom and Dad wrapped this tape years ago, planning to give it to you on your eighteenth birthday. But Grandma stopped them.”

“What? But why?”

Two women having a conversation | Source: Midjourney

Two women having a conversation | Source: Midjourney

Lisa shook her head. “She said you weren’t ready, that it would traumatize you. She took the gift from them and hid it somewhere — I guess now we know where.”

“In a wall? She put it in a wall?

“You know how she was. She probably put it there thinking fate would lead you to it once you were ready.” Lisa squeezed my hand. “She loved you so much. Maybe too much. After nearly losing you as a baby, she couldn’t bear the thought of causing you any pain, even if it meant hiding the truth.”

Two women having a serious conversation | Source: Midjourney

Two women having a serious conversation | Source: Midjourney

I thought about Grandma, and how she’d hover when I played sports, making me take breaks I didn’t need. All those moments took on new meaning, weighted with understanding I’d never had before.

“I have someone else’s heart,” I said slowly, testing the weight of the words. “Every birthday I’ve celebrated, every milestone, every heartbreak and triumph… it was all because of him.”

“You have Adam’s heart,” Lisa corrected gently. “And it’s the strongest heart I know. It’s carried you through everything and helped you become this amazing person. That’s what organ donation is about: life continuing, love extending beyond loss.”

Two women speaking while seated on a sofa | Source: Midjourney

Two women speaking while seated on a sofa | Source: Midjourney

I rewound the tape, watching the little boy again. He couldn’t have known, reciting his poem, that he was creating this message for a stranger who would carry his heart.

“I need to find his family. To thank them. To…” I trailed off, uncertain. “What if they don’t want to hear from me? What if it’s too painful? They lost their child — maybe they don’t want a reminder.”

Lisa considered this, her nurse’s compassion showing through. “But what if they’ve spent years wondering about the little girl who received their son’s heart? What if knowing you, seeing how you’ve lived, helps them feel their choice meant something?”

A woman frowning while deep in thought | Source: Midjourney

A woman frowning while deep in thought | Source: Midjourney

With the help of my parents’ old records and Lisa’s internet sleuthing, we found Adam’s parents still living just two hours away.

It took weeks to gather the courage to contact them. I put together a Christmas basket — a nod to the hidden gift that revealed the truth.

Standing on their porch, my heart — Adam’s heart — pounding, I almost turned back. The basket felt inadequate, my words insufficient for the magnitude of what I needed to express. Then the door opened.

A woman on a porch holding a gift hamper | Source: Midjourney

A woman on a porch holding a gift hamper | Source: Midjourney

I found myself looking into eyes I recognized from the video. Adam had had his mom’s eyes.

“Hello,” I managed, my voice barely a whisper. “My name is Janet, and I…”

But Adam’s mother was already reaching for me, tears streaming down her face. “I know exactly who you are, Janet. We hoped this day would come when one of you would reach out to us. We’ve been waiting for so long.”

As she pulled me into a hug, I felt the steady beat in my chest strengthen, as if recognizing its first home.

Close up of an emotional woman's face | Source: Midjourney

Close up of an emotional woman’s face | Source: Midjourney

On a December afternoon, much like the one when they lost their son, we began to heal wounds we didn’t even know we had.

Some gifts, I learned, are worth waiting for — even if they’re hidden in walls, wrapped in faded paper, holding truths that change everything.

And sometimes the greatest gift isn’t in the revelation itself, but in the way it connects us to the stories we never knew we were part of, the lives that touched ours in ways we’re only beginning to understand.

A woman smiling while staring up at the sky | Source: Midjourney

A woman smiling while staring up at the sky | Source: Midjourney

This work is inspired by real events and people, but it has been fictionalized for creative purposes. Names, characters, and details have been changed to protect privacy and enhance the narrative. Any resemblance to actual persons, living or dead, or actual events is purely coincidental and not intended by the author.

The author and publisher make no claims to the accuracy of events or the portrayal of characters and are not liable for any misinterpretation. This story is provided “as is,” and any opinions expressed are those of the characters and do not reflect the views of the author or publisher.

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