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[Post any interesting sciency stuff] - You know any interesting concept, field of research, that others might not know about?


Notice: Discussion thread is over > here <

I want to pick your brains!
Share anything you find interesting broadly related to science and engineering that others might not know about. (Computer science, mathematics, physics, chemistry, biology, material science, geology, metrology, meteorology …)
Write the name of the topic on the top of the comment and at least one link below with a short description. Credit to @metamachine @Aremis and a few others who gave me the idea with this and this thread. Feel free to add interesting links, videos and such.



Reversible computing

still heavily in research, promises much higher density and more efficient circuits

The von Neumann-Landauer principle fundamentally limits the possible density of processors and logic gates because of the fundamental entropy change in non-reversible bit operations. Reversible logic does not need power on a fundamental level.


  • Fredkin Gates
  • physical reversability
  • adiabatic circuits


Please only post new interesting topics, research fields, concepts, … here. You can discuss and chat about these topics in the discussion thread (the intention is to keep this thread easily browsable for people who are only interested in the topics):

Just wondering some shit

This thread was in a probability space and now it’s real… Good thread… :+1:

To begin with… I found this fascinating… watch till the end and you’ll be surprised…


I have abook that I read every once in a while that is quite interesting.

30-Second Quantum Theory

If you are interested in physics, it is a great read. Quantum physics is really some mind blowing stuff.


Here is another interesting topic. Something that I have linked here before:

Ultimate physical limits to computation

This paper discusses the extreme limits ( from a physics standpoint ) to how fast and how dense computers can become. (There are a couple of assumptions made, this does not apply in the same way to reversible logic that I mentioned in the op.)

Spoiler (funny quote):
“Nonetheless, although we do not know the exact number of bits that can be registered by a one kilogram computer confined to a volume of a liter, we do know the exact number of bits that can be registered by a one kilogram computer that has been compressed to form a black hole. … The amount of information that can be stored by the 1 kilogram computer in the black-hole limit is 3.826x10^16 bits. Note that this number is independent of the physics of the standard model, and relies only on the physics of quantum Fields on curved spacetime. The black-hole computer can perform 2.7129x10^50 operations per second, the same as the 1 liter computer.”

@Cobra92fs I have not seen that book before, thanks for the link!

To increase the critical mass, here are two further topics. I would really like to see some posts from the computer science guys in this forum or even better, interesting stuff all you everyday programmers stumbled upon.


A Fully-Integrated Flexible Photonic Platform for
Chip-to-Chip Optical Interconnects

This is an older paper, however there are some amazingly streight forward ideas in there and a lot of interesting keywords to google.

My personal recommendation, beeing a Astrophysics nerd:


The Laser Interferometer Gravitational-wave Observatory

Two must reads:

I rememper two years ago when they detected their first significant signal ever, a probable black hole merger. Just think about that, we can detect waves of spacetime itself! :open_mouth:


If you are interested in the safety of Artificial Intelligence systems, you have to follow this guy on youtube:

Especially the series
Concrete Problems in AI Safety

Keep in mind, that he mostly discusses the higher level problems of AI and skips the immideate, more obvious, near term implications.


This is good one…


Single adress space, minimalistic OSs. Advantages are low overhead in VMs, fast reboot and switching of running code, low latency.

surface level talk about IncludeOS (service orinted unikernel):

I know very little about operating systems and the technology around it, but I found some of the points made very intriguing. I’d like to know more from those people who know more about the pros and cons of Unikernels over here.


Wow id like this peer reviewed. Comments are not on. It’s making me think. logarithmic numbers are insane.

On the topic of particials in the universe. We are seeing now the most of the universe we ever will and if we dont capture / record it. It will be lost.

The universe is expanding and accelerating. So whole galaxies we see today on the edge will cross over the visible light boundy to us and be lost forever.

So breed fast before we lose too many particles.


Visualization is a great way to develop the intuition of complex things… This video is a good example and also lot of fun to get started with quantum physics…


Post any interesting sciency stuff? Count me in. Just published a few weeks ago, out of CIT.

“Synthetic protein-level circuits could enable engineering of powerful new cellular behaviors.”

The paper is pretty dense (as are pretty much all papers from Science) and there’s 30 pages of supplemental material, but this is an idea I’ve had kicking around for a long time. There’s some good and some less good in the article though. Basically, they were able to program cell death based on semisynthetic logic circuits. One cool thing is that they used multiple logic gates, with each dependant on the result of the prior, which as far as I can tell is a first.

This is a big deal because it could potentially lead to protein complexes or circuitry that can make intelligent, autonomous decisions about drug delivery, or adopt conformations or fluorescence intelligently to relay information to scientists and doctors about the state of a cell. For instance, we can kill cancer cells fairly easily. The problem is killing only the cancer cells. There’s often not one clear biological indicator that something is a cancer cell - it’s usually determined by a series of information. We could theoretically design proteins that could examine multiple aspects of a cell, do some basic math, and if the cell scores high enough, kill it. That would be an incredible change in cancer therapy.

The downside to this is that it’s semisynthetic, like most of the novel protein design today, it isn’t truly novel. We know a lot about how proteins fold but still don’t have a clear model that works with a high enough success rate to think about designing proteins from scratch. Until we get that, the most we can do is adapt existing proteins and make mutations to those, which has a whole host of limitations.

Ultimately this is a computing problem. Once we crack the folding code (most likely to be done by brute force since it’s tough to get a clear picture of what’s happening on an atomic level when proteins are folding) it’ll be possible to design de novo proteins that are super-capable and super-efficient for our purposes.


Implementing black holes as an efficient power plant

Black holes are surprisingly the most efficient method of extracting energy from mass.
Here is a video for the short and easy explanation:


Nice blog post about nature of spacetime and few abstract ideas…


China has mated same sex mice too see if it would work. Female worked, as it should because a woman is XX chromosomes. Male died a few days after birth. Males are XY chromosomes. They made a YY mice.


Light Transistors of the future - thread
Thanks to @Radio_God for the OP. There are interesting links in that thread. I am just linking the thread here for reference.


The Antikythera Mechanism
Most of you will probably know about this amazing piece of ancient Greek machinery. I am following this video series for a while now and I have learned a lot in the process. Also production quality is through the roof on this one:

also, here is a series on

Ancient Tool technology

It does not mean that this is exactly how machine work was done but it shows some of the viable options.

And if you didn’t know about the Anthikythera mechanism I would suggest to start here: