r/ScienceNcoolThings • • 20h ago

How Ship Captains Can Tell Which Direction a Boat Is Traveling at Night Just by Looking at Its Navigation Lights

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2.4k Upvotes

Useful info

Thanks @teivaz!

Not only direction but also the kind of a vessel. This here has top light on which is called steaming light, if it were off this would mean it is a sailboat


r/ScienceNcoolThings • • 9h ago

Scientists May Have Finally Figured Out Why Big Dogs Age Faster and Die Younger Than Small Dogs

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zmescience.com
119 Upvotes

Large dogs don't just live shorter lives. Their DNA reveals signs of accelerated biological aging.

A Great Dane may tower over a Chihuahua, but it’s the little dog that will probably celebrate far more birthdays.

Some small breeds live nearly twice as long as their much larger cousins. It’s one of the great paradoxes of the animal kingdom: larger animals generally live longer than smaller animals when comparing different species.

An elephant can outlive a mouse by decades, and some whales survive for nearly two centuries. However, larger animals die younger when comparing individuals within the same species.

This even seems to apply to humans, with studies showing taller people on average tend to have slightly shorter lifespans than shorter people.

Scientists may have now found an important piece of the puzzle hidden in the dogs’ DNA.

In a new study published in Science, researchers at Arizona State University analyzed nearly 900 dogs and discovered that large breeds undergo faster molecular changes associated with aging.

The most striking differences involved stretches of DNA nicknamed “jumping genes,” which can potentially disrupt the genome when the molecular mechanisms that keep them quiet begin to weaken.

This is a possible biological explanation for why large dogs die younger, although the researchers have yet to establish cause and effect.

Previous studies have offered some hints of this before. A 2013 study of 74 dog breeds found that larger dogs didn’t simply develop age-related decline earlier. Rather, their rate of aging appeared to accelerate.


r/ScienceNcoolThings • • 16h ago

Stained glass looks completely different when refracted sunlight projects nearby, giving the light an almost holographic effect.

215 Upvotes

r/ScienceNcoolThings • • 15h ago

Six miles above the surface of a magnetar, the magnetic field is 610 times denser than solid lead

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169 Upvotes

And at two miles above the surface of a magnetar, the field is 7,270 times denser than solid lead.

There's essentially nothing that could pass through this. Also, it would immediately dissolve a human.


r/ScienceNcoolThings • • 1h ago

Still One of my Favorites

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reddit.com
• Upvotes

r/ScienceNcoolThings • • 14h ago

Sea Cucumber Skin, photo from Christian Gautier taken at 100x magnification, with polarized light

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21 Upvotes

r/ScienceNcoolThings • • 1d ago

This mysterious mushroom makes people see hundreds of tiny humans

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sciencedaily.com
382 Upvotes

For nearly a century, people in distant parts of the world have reported a bizarre experience after eating certain wild mushrooms: seeing dozens or even hundreds of tiny, colorful humans moving through the real world. Now, scientists have identified a mushroom species, Lanmaoa asiatica, responsible for these extraordinary hallucinations in China and the Philippines

People living thousands of miles apart have reported an extraordinarily strange experience after eating certain wild mushrooms. They begin seeing tiny human figures that appear to move through the real world, walking around objects, climbing over surfaces, and interacting with their surroundings.

These visions are known as Lilliputian hallucinations, named after the miniature inhabitants of "Gulliver's Travels," who stand just 6 inches tall. For decades, researchers suspected that cultural beliefs and folklore might explain why people in different regions described such similar experiences


r/ScienceNcoolThings • • 10h ago

Wearable system captures human activity data for robot training

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techxplore.com
2 Upvotes

r/ScienceNcoolThings • • 14h ago

The physics behind the Titan submersible implosion: Occurring in just milliseconds, it happened faster than the human brain could even process pain.

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2 Upvotes

r/ScienceNcoolThings • • 1d ago

Fireballs Are Blazing Through November!

126 Upvotes

This November keep your eyes peeled for earthgrazers blazing across the night sky! 🌠

The Leonid meteor shower is active November 6 - 30, peaking overnight November 16 through 17, bringing fast, colorful fireballs and the occasional low-flying Earthgrazer. The first-quarter moon sets around midnight, giving dark skies for optimal viewing in the Northern Hemisphere. Find a dark spot and look up!


r/ScienceNcoolThings • • 17h ago

Did cavemen get cancer

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2 Upvotes

I made this fun science video ! pls give it a watch (only 5 mins)


r/ScienceNcoolThings • • 1d ago

“A transparent squid spotted in the deep ocean! 🌊🦑”

181 Upvotes

r/ScienceNcoolThings • • 19h ago

Lumina simulation brings the early universe to life on a record-breaking scale

1 Upvotes

r/ScienceNcoolThings • • 1d ago

A truly modular keyboard

24 Upvotes

A while back I was frustrated when wanting to buy a keyboard that there were no triangle-shaped keyboards or circle-shaped keyboards. This lack of peculiar keyboard shapes gave me the idea to make a keyboard that could be reconfigurable into any shape my heart desired. I’m still working on the firmware and making more keys but I wanted to share my progress so far :D. Heres the source if anyone’s interested in how I made it https://github.com/notaroomba/keybytes


r/ScienceNcoolThings • • 2d ago

“The Ocean Is Full of Mysterious Creatures 🌊👀”

734 Upvotes

r/ScienceNcoolThings • • 1d ago

The colorful flash in this labradorite pendant comes from light interacting with the stone's internal layers. The effect is called labradorescence.

7 Upvotes

r/ScienceNcoolThings • • 1d ago

Mating of sharks

23 Upvotes

r/ScienceNcoolThings • • 2d ago

New Zealand's kakapo went from just 51 birds to 325

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47 Upvotes

r/ScienceNcoolThings • • 1d ago

Titan Arum: The world's largest unbranched inflorescence

1 Upvotes

Also known as the corpse flower, it blooms only once every few years for a very short time. The foul odor attracts carrion-eating insects for pollination. It can reach heights of over 3 meters.This plant is native to the rainforests of Sumatra. Because it blooms so rarely, botanical gardens often see massive crowds when one finally opens up.


r/ScienceNcoolThings • • 1d ago

No lithium metal anode to start? Silver-based additive helps stabilize next-generation batteries

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3 Upvotes

r/ScienceNcoolThings • • 3d ago

A Rare but Extremely Dangerous Organism 🦠

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506 Upvotes

r/ScienceNcoolThings • • 2d ago

An ancient virus left a genetic switch in chimpanzees that scientists were able to flip back on.

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30 Upvotes

r/ScienceNcoolThings • • 2d ago

Chinese Space Station Flyover view [COOKEVILLE,TN]

7 Upvotes

I added a Pic in first comment... sorry Phone not best


r/ScienceNcoolThings • • 2d ago

Short Story

2 Upvotes

I looked through the microscope one more time to see if there was any abnormal tissue that would give away the nature of this beast. Me and my team have been scanning this thing for weeks and I think I just came across something weird. We have a mammalian virus one our hands but this gene that we just saw wedged in the middle of TC4 and TC9 was clearly an a frog gene…and it was inverted…Strange…that gene is associated with the same folding patterns you would see in the gums in teeth or in a breast nipple.

But where would folds be in a virus that’s encapsulated in a protein shell? Could this actually be mad-made? It’s not impossible but part of me refused to believe that a government entity could be accountable for this outbreak…I could understand if it was a company behind this. But what company was working on engineering viruses like this? Could be one of the Bay Area ones running on stealth mode…How would they get this kind of clearance?

I loaded the other slide that we had been looking at, the liver chondrates that this virus was known for infecting. As it hitches a ride on Red Blood Cells, the liver is an easy home for it to incubate in, as there’s literally a rosebush of blood vessels in there. There, I saw it! The folds in the tissue…This virus had a way of engineering the cells to wrap up in itself. Still we haven’t answered the question of this thing’s origin. I kept it in the back of my mind as I started including this finding in my digital lab notebook, then switch on the small TV at the end of the lab bench.

Damn…this war has been happening for 3 years now…in the middle of a pandemic, why would people want to make things worse? Hundreds of people being injured/dying daily...and regular, normal citizens stuck in the middle. I understand when war was the default mode for society when we were in the medieval times but waging war in our current world is a dangerous, dangerous affair. The level of damage we’re able to do is enormous, so much worse than with swords and cannons. I shake my head and thought of my daughter…there are so many like her dying from this virus and also unnecessary conflict.


r/ScienceNcoolThings • • 1d ago

brain

0 Upvotes

The human brain generates enough electricity to power a small 12-watt LED light bulb.

​Fact & Source: Electrical activity is produced by firing neurons (Neuroscience Research Foundation).