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

A girl waves to the train that passes by every day. Three years later, the train driver sees a poster on the window

When was the last time you showed kindness to an unknown individual?Even if you believe that this is a pointless question and that you shouldn’t bother trying to help someone you don’t even know, keep in mind that doing good is always worthwhile.Behaving kindly toward others, even complete strangers you see on a daily basis, has a greater positive impact on their life than you may realize.Furthermore, you never know who among those total strangers will stick around and end up playing a significant role in your life.The tale, shared on the Facebook page *Love What Matters* by Briana Hefley Shepard, describes the peculiar bond that developed between a small girl named Rio and the train conductors who were eagerly awaiting her greeting from their enormous window.Your heart will melt at this story.Ensure that you finish reading the story.About three years ago, our company relocated to the new site.Because of its proximity to the railroad lines, we have a front-row seat to observe all the locomotive activity.The workers quickly noticed Rio extending a greeting to them, and they returned the kind.

They made it into a ritual over time.They let out a whistle, she hurried to the window, they opened their windows, and all of them grinned broadly.Almost every time, I would cry. Then Rio began attending school a few weeks ago.I was impacted by her daycare adjustment a bit more than I had anticipated, but more on the first day when the train passed and she wasn’t present.They opened their windows and whistled, but I was the only one crying and hesitantly waving.Next day, I created a placard.All I wrote was, “She started school.”When I heard the whistle, I hurried to the window and waved my placard.That was three weeks ago. “Oh, I shed a tear.”

Someone knocked on the door this morning, nearly minutes after I entered the store.It was a dude with earbuds hanging down who was wearing a bright yellow t-shirt.Because that’s what we do here, I assumed it was a construction worker who wanted to discuss construction-related topics.I was in error. He had come to inquire about the blonde girl who was greeting the trains.Everyone was curious about her whereabouts as she was an employee.They stopped higher up the tracks, came to our building, and knocked on our door because they had a short train today.Oh, I did cry.Despite having seen my placard, they were unable to read what it said.

Though they had to double check, they had believed she had started school.Her greetings, he added, brightened their day.For three years, they had shared these times together. They miss her and want to do something for her.When they inquired about sending her something, I answered, “Of course!”In a few weeks, they will send her a birthday present.Throughout the past few years, it has been nothing short of miraculous to see their unusual bond.I feel optimism and love knowing that they have been impacted just as much as we have.My faith in mankind and goodness has been reinforced by their presence today and their ongoing generosity to Rio.These are the times we shall never forget.

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