A graphical comparison shows the amount of water on Jupiter's moon Europa as compared with Earth's water. Its subsurface ocean plus ice layer could range from 80 to 170 kilometers in average depth [1024x768]

mepper · 2012-05-24T09:48:29.428593+00:00

From wikipedia: "in the deep oceans at 4 km depth, where pressures are 40 MPa, there is only a 1.8% decrease in volume." It's not much, but definitely still something. That might be real engineering, where we can in most cases practically assume water is incompressible, but it's not science.

Blupsy · 2012-05-23T22:37:00.865346-07:00

This blew my mind, completely obvious but I never thought about Pythagorean triples outside of triangles before. However the Pythagorean theorem is only for triangles, the theorem is what proves that Pythagorean triples apply to the sides of triangles in the first place.

DrJulianBashir · 2012-05-24T05:31:23.069211+00:00

I saw you give a talk about this last week, and I remember you mentioning that you had been working on the project for three years or so. I'm curious about the development process. Was much of this time spent screening different clones to correct the spontaneous flipping and stochiometry mismatch problems, or were there other variations in the overall design you went through? And did I read it right that the system works with only one copy of the data register per cell? I wouldn't have thought that it would stay stable for very long.

Vpicone · 11 days

If they were combined into one coherent beam, would you get a green-ish laser that oscillates in intensity?

jazcat · 11 days

Something like this

Goo_Back · 11 days

Good article, I downvoted because of the ridiculously sensationalized headline.

abbe-normal1 · 11 days

Ah that's probably true, /r/biology posts don't normally get this many upvotes.

nastyscones · 11 days

A beverage made of equimolar amounts of water and KCl doesn't sound to refreshing, though.

abbe-normal1 · 11 days

Didn't know POLITE_ALLCAPS_GUY was a biologist.

atomic_hombre · 12 days

Oh I get it, you're friends with the urinator aren't you?

C0rvette · 17 days

I used to do this when I was a kid because I was afraid that God could watch me taking a shit.

c1rcus · 19 days

He just gets the back position

Kwurty · 20 days

You probably should have posted this in /r/math, as it can be solved with graph theory. The answer is yes if and only if the corresponding graph is planar. From wikipedia: "A finite graph is planar if and only if it does not contain a subgraph that is homeomorphic to K5 or K3,3." Since your graph is the complete bipartate graph K3,3 the answer is no.

PhilosophicFruitFly · 23 days

Jesus christ why am I still reading these

PhilosophicFruitFly · 23 days

There is some seriously fucked up stuff in this thread, but this was the only post to make me throw up in my mouth a little. Congrats.

PhilosophicFruitFly · 23 days

I've got the weak ligaments too, and it's popped out a few times. The first time I was out of commission for quite a while. Never had it go through the skin though, Jesus.

matsyes · 24 days

None of those are fractals, and none of them have any real connection to physics. This article is complete bull and the author obviously has no idea what he is talking about.

RKKatic · 25 days

I think you're confused about your infinities. An infinite universes does not imply that every possibility exists. For example, there are an infinite amount of odd numbers, but none of them are four. You are probably referring to the many-worlds interpretation of quantum mechanics. This really isn't my field, but I can try to give you a basic rundown (hopefully someone with a better understanding of it will come along soon to correct me). In quantum mechanics, particles or systems of particles are represented by a mathematical object called a wavefunction. According to the more popular Copenhagen interpretation the wavefunction does not represent physical reality in itself but gives the probability of observing a particle or system in a given state. In some situations the wavefunction may be a mix (superposition) of states that you would normally think to be mutually exclusive, like a particle being in one box or another (or the famous cat being alive or dead). When the particle is "observed," the wavefunction collapses and it now resides fully in one box or the other, but previously it in a way existed in both places at the same time. Which one it ended up in when observed was essentially random. The many-worlds interpretation does away with the somewhat messy idea of wavefunction collapse and and instead says that the system stays in a superposition of states that become decoherent and no longer influence each other. So the universal wavefunction would now contain two separate "realities" where the scientist observes the particle in each box. I'm not sure that the total number of worlds is actually infinite or just unimaginably large, but they all still have to obey the laws of physics. Of course, since I think there usually at least an extremely tiny positive probability of any particle being almost anywhere, you could have a world in which the entire lord of the rings saga happened not because magic was real but because it got really lucky and everything always just ended up exactly where it needed to be.

WhaThaFunk · 27 days

Well that was probably the most horrible thing I've ever seen. Thanks!

UniverseAtLarge · 1 month

There is no such thing as "unlimited energy," it all has to come from somewhere. Tesla was undoubtedly a genius, but also went somewhat crazy near the end of his life and believed he was communicating with martians, among other things. A lot of conspiracy theorists like to think that some his inventions haven't been replicated since, but that is absolutely not true. Everything he invented is completely understood within the context of modern science, and the reason why many of those technologies (wireless energy transfer) are not used today are because they are obsolete or wildly impractical.

naive_dreamer · 1 month

I did the same calculation for a similar post a few months back and got 60 microns, so it's somewhere in that range.

RedDaggerx · 1 month

I'm not that kind of biologist, but it looks absolutely fake.

icegoat · 1 month

You might be a bit late on that.

takkuso · 1 month

This is an interesting variation on the problem. Of the cycles I found, your length-two cycle (and its larger versions) are the only ones that don't include a number with a leading zero and so would be the only ones remaining if we allowed the number of digits to decrease. I actually really can't think of an intuitive reason as to why the 6534->2178 cycle should be the only four-digit number following the pattern of pairs of digits summing to 99, despite the fact that we see this a lot with 6-digit numbers. Anyway, I modified my code to look at your version of the problem and managed to get it up to eight digits. For 1-3 digits, all numbers end up at zero. Here is the output for 4-8 digits:

4 digits:

9363 instances of 0

637 instances of 6534->2178

5 digits:

54963 instances of 0

38667 instances of 6534->2178

6370 instances of 65934->21978

6 digits:

515421 instances of 0

280416 instances of 6534->2178

185056 instances of 65934->21978

19107 instances of 659934->219978

7 digits:

4763001 instances of 0

1916596 instances of 6534->2178

490346 instances of 65934->21978

2638987 instances of 659934->219978

191070 instances of 6599934->2199978

8 digits:

45814012 instances of 0

16710518 instances of 6534->2178

6111098 instances of 65934->21978

21959156 instances of 659934->219978

8699030 instances of 6599934->2199978

526302 instances of 65999934->21999978

144907 instances of 23981958->61936974->13973058->71064873->33218856->32662377->44664246->19582398->69746193->30581397->48737106->11436678->76226733->42464466

34977 instances of 65346534->21782178

8 digits took about half an hour and almost six gigabytes of memory so that's as far as I'm going to be able to go. With more digits you get the same cycles as well as a new one with an extra nine in between the 65-34 or 21-78, but 8 digits adds some new ones. You get the 65346534<->21782178 cycle which is interesting in itself, as well as an entirely new one of length 14 that I can't find any discernible pattern in. I would conjecture that you get new patterns cropping up every four digits, but I can't verify that. Without actually proving it mathematically I was able to verify that the first new pattern holds up to 6534653465346534653465346534653465346534<->2178217821782178217821782178217821782178. Jamming nines in the inside of those doesn't seem to work out, though. Not too sure what to make of this.

edit: just realized 6324 is an integer multiple of 2178, this likely has something to do with it.

Jumpy89

TROPHY CASE

Jumpy89

TROPHY CASE

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