Amusing Science

We are the Borg.
Bruce
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Re: Amusing Science

Post by Bruce »

Cubli. Perfect present to put under the tree for the little ones.

Mom! Dad! One of the presents got up and walked away!

:twisted:
Witness
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Re: Amusing Science

Post by Witness »

https://s2.postimg.org/7zanhnwsp/qwzuerefsh401.gif
gnome
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Re: Amusing Science

Post by gnome »

I call bullshit. How is the green light getting through the solid yellow pencil?
Witness
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Re: Amusing Science

Post by Witness »

gnome wrote:I call bullshit. How is the green light getting through the solid yellow pencil?
Magic. :mrgreen:
Bruce
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Re: Amusing Science

Post by Bruce »

gnome wrote:I call bullshit. How is the green light getting through the solid yellow pencil?
But you're ok with the red and blue light getting through? What about the magenta?

Maybe it's just a really reeeeeally polarized filter. :P
gnome
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Re: Amusing Science

Post by gnome »

I'm just prejudiced against green.
ceptimus
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Re: Amusing Science

Post by ceptimus »

I suppose the filter *could* just be stretching out the images along the whole length of the filter - in which case it would be useless for viewing anything that's not straight and regular along its length. That would explain the 'trick' without needing photoshop-style trickery.

I'm not saying that is how it was done - it's just one possibility.
Doctor X
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Re: Amusing Science

Post by Doctor X »

Jesus, Buffy.

--J.D.
Rob Lister
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Re: Amusing Science

Post by Rob Lister »

Clearly gnome is a green racist but I too have problems with the color blue.
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

This one's a bit hard to believe too. Self-repairing glass:

https://japantoday.com/category/tech/Gl ... y-of-Tokyo
Witness
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Re: Amusing Science

Post by Witness »

ceptimus is, as usual, right: the plastic thingy diffuses light, but only in one direction. As the pencils are linear objects, we don't notice the smeared out image.

Now for something classic:
ceptimus
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Re: Amusing Science

Post by ceptimus »

That one really has been faked. The whole point of that illusion is that white squares in the shadow are as dark as the dark squares outside the shadow. If you physically move a dark square into shadow it becomes darker still.
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

I wonder what it looks like from a different angle or under different lighting conditions.

There are definitely some weird optical illusions.
Witness
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Re: Amusing Science

Post by Witness »

ceptimus wrote:That one really has been faked. The whole point of that illusion is that white squares in the shadow are as dark as the dark squares outside the shadow. If you physically move a dark square into shadow it becomes darker still.
Sure, but where exactly is the forgery? :mrgreen:
sparks
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Re: Amusing Science

Post by sparks »

Anaxagoras wrote:This one's a bit hard to believe too. Self-repairing glass:

https://japantoday.com/category/tech/Gl ... y-of-Tokyo
Alien pee glass indeed. :)
Witness
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Re: Amusing Science

Post by Witness »

Cool science job:

[youtube][/youtube]
sparks
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Re: Amusing Science

Post by sparks »

Sublimed with Salmonelliac?

WTF? :)

Oh. It's alchemy. The first attempt, nay religion if you will, for chemistry. As you were. Before you were so unfortunately sublimated.
Witness
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Re: Amusing Science

Post by Witness »

https://s9.postimg.org/8ujeprs8v/Slinky.gif
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

Makes sense if you think about it.
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

Abdul Alhazred wrote:Hmm. Is this right?

The center of gravity is falling at the speed expected for the mass of the slinky?
That is correct.

The other thing to note is that the amount of stretch at the beginning is determined by gravity. If you held a slinky like that on the moon, where the gravity is only 1/6th as strong, initially it would be much shorter. On a more massive planet with stronger gravity, it would be stretched out longer.

I don't know if it's a coincidence that the bottom doesn't seem to move at all. Maybe that's just a function of how springy the slinky is, but I'm guessing it's just proportional to the amount of extension. The farther you stretch it, the faster the ends move when you release it. Unless you stretch it so far that you permanently warp the metal. Intuitively it seems right to me though.
Witness
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Re: Amusing Science

Post by Witness »

Anaxagoras wrote:I don't know if it's a coincidence that the bottom doesn't seem to move at all.
No. You can picture the release as a wave traveling down: as long as it hasn't reached the end, said end "doesn't know" about the release.



Details: http://all-that-is-interesting.com/science-pranks.
Bruce
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Re: Amusing Science

Post by Bruce »

Perfectly describes what a typical day as a research scientist is like:
Witness
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Re: Amusing Science

Post by Witness »

There are hundreds of proofs of Pythagoras' theorem. but this one is kinda cute:

https://s9.postimg.org/iu71uem8f/dsph0fy5pv701.gif
Witness
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Re: Amusing Science

Post by Witness »

Evolution & Human Behavior wrote:Different impacts of resources on opposite sex ratings of physical attractiveness by males and females

Abstract

Parental investment hypotheses regarding mate selection suggest that human males should seek partners featured by youth and high fertility. However, females should be more sensitive to resources that can be invested on themselves and their offspring. Previous studies indicate that economic status is indeed important in male attractiveness. However, no previous study has quantified and compared the impact of equivalent resources on male and female attractiveness. Annual salary is a direct way to evaluate economic status. Here, we combined images of male and female body shape with information on annual salary to elucidate the influence of economic status on the attractiveness ratings by opposite sex raters in American, Chinese and European populations. We found that ratings of attractiveness were around 4 times more sensitive to salary for females rating males, compared to males rating females. These results indicate that higher economic status can offset lower physical attractiveness in men much more easily than in women. Neither raters' BMI nor age influenced this effect for females rating male attractiveness. This difference explains many features of human mating behavior and may pose a barrier for male engagement in low-consumption lifestyles.
http://www.ehbonline.org/article/S1090- ... X/fulltext

:mrgreen:
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

Thought experiment about what would happen if you took away all the microbes:




I bet if there were no microbes in your gut, your poop would be quite different. The poop coming out would look a lot more like the food that went in. Maybe not. :notsure:
sparks
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Re: Amusing Science

Post by sparks »

Without Our Friends The Microbes, we would have evolved to deal with our food without their help. Perhaps.
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

Or, more likely, we just wouldn't exist in the first place. I think microbes are a necessary intermediate step between no life and complex multi-cellular life.

Two things: the chloroplasts in plants and the mitochondria in animals (actually almost all eukaryotic organisms) can be thought of as separate species since they have their own DNA. But they didn't really get into that in the video.
sparks
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Re: Amusing Science

Post by sparks »

One of the many fascinating things they didn't cover (or perhaps didn't know about yet?) in my high school biology classes: Mitochondrial DNA. How the fuck does that work?

And then there's these fucking magnets...
Bruce
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Re: Amusing Science

Post by Bruce »

They used to think that atoms were the smallest particle. Then it was protons, neutrons, and electrons, but those can be broken apart as well. And the distance between them is vast. It has become increasingly clear over the course of the years that there really isn't such a thing as a solid. What we think of as solids are really just combined fields of electrons repelling against each other, exactly the way magnets repel each other. When you take those fields away, the entire universe can be compressed into a tiny point.

Ergo, most people think I'm fat, but I tell them that it's mostly empty space. :D
ceptimus
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Re: Amusing Science

Post by ceptimus »

You need to travel east, not west, to reduce your weight. That's why most space rockets are launched eastwards.
Bruce
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Re: Amusing Science

Post by Bruce »

I know how to keep from gaining weight.

Don't move.

As you approach the speed of light, your mass increases, thus you gain weight.

The farther you are from the speed of light, the better. That's why I spend most of my time on the couch.

The only reason I'm gaining weight is because the damn earth is moving so fast. :(
Witness
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Re: Amusing Science

Post by Witness »

https://s9.postimg.org/z1xtwkdwf/Science.png
Witness
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Re: Amusing Science

Post by Witness »

https://s9.postimg.org/3p4df1qun/cell-d ... 945_2x.jpg

https://s9.postimg.org/lrxg69uf3/drummo ... 960_2x.jpg
Precise Metallic Replicas of Ancient Fossils and Cells by Allan Drummond

Each creature is sculpted digitally by Drummond using scientific references, including specimens from private collections. Next, they are 3D printed in wax, and finally lost-wax cast in bronze and finished by hand. The sculptures are rendered down to the smallest detail, including gills, antennae, legs, and even mitochondria in cell division.
Details & more pics: http://www.thisiscolossal.com/2018/01/p ... d539db565e
Witness
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Re: Amusing Science

Post by Witness »

sparks wrote:One of the many fascinating things they didn't cover (or perhaps didn't know about yet?) in my high school biology classes: Mitochondrial DNA. How the fuck does that work?

And then there's these fucking magnets...
Here's a nice story about mitochondria: https://www.reddit.com/r/AskReddit/comm ... t/du13k9x/.
Witness
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Re: Amusing Science

Post by Witness »



An explanation (a bit lengthy): https://www.youtube.com/watch?v=cUCSSJwO3GU

I remember a SF story using that trick. Abdul?
sparks
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Re: Amusing Science

Post by sparks »

First attempt at ball-bearings. They do, however require special lubrication: The blood of small children.
Witness
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Re: Amusing Science

Post by Witness »

Abdul Alhazred wrote:Not off hand.
I just remember that some starship crashed on a planet where the circle was sacred, so the crew couldn't use logs for moving their machinery. Until they thought of this geometric trick (using 1/3 of a circle was OK). :mrgreen:
Anaxagoras
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Re: Amusing Science

Post by Anaxagoras »

Get a load of this crazy airplane:



Only a taxi test, it hasn't gone airborne yet, but wow, that's an interesting airplane design.

https://www.theverge.com/2018/2/28/1706 ... test-video
Doctor X
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Re: Amusing Science

Post by Doctor X »

I keep thinking it will split down the middle.

--J.D.
Rob Lister
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Re: Amusing Science

Post by Rob Lister »

Abdul Alhazred wrote:Not off hand.

I suppose those are just show pieces, and spheres aren't going away any time soon.
It's not without its applications however.

https://i.imgur.com/uVzzkyl.gif