Life Definition and 1000 Threads

Exciting times for Origin of Life enthusiasts. There have been three recent publications that are relevant to origin of life issues. They are: A) The moon forming impact may have gotten plate tectonics started early. A Giant Impact Origin for the First Subduction on Earth Open access from...

Fermilab has been hit by the every-17-years plagues of periodical cicadas. Two days ago, the noise was deafening. Yesterday it was quieter. Today you need to struggle to hear one or two. Dead ones litter the ground. Why do they die at the same time? Emergence took 4 or 5 days. I would expect...

Game of Life Playing out in rainwater on my door screen... Appears to be using highly permissive life/death parameters tho...

If we have a kg of something that is 100miljon Celsius degrees, and can controlably use this heat somehow, we can sustain life, grow crops, drive steam engines and with these we could build a whole city like New York, we can create a lot of mass with very low entropy, things that are very...

https://bigthink.com/hard-science/accidentally-killed-life-mars/ Interesting article about a type of life that might exist on Mars. It brings up questions on how do we test for the existence of life.

As I understand, half life's are where unstable nuclear isotopes Undergo radioactive decay, where they emmit either aplha beta or gamma during this decay. I'm looking for some clarification on whether when an atom undergoes decay, does it then change into another element/ isotope of an...

Hello! I was just started the topic gyroscopic motion These questions come to my mind. please guide me that how gyroscope is used in mobiles what is its function in mobiles and also want to know their role in aircrafts that how it helps pilot to determine the position of aircraft etc. Please...

I had a rear 3/16" OD steel brake line in my car fail due to rust. I spliced out the area with the hole with copper nickel line, but, I noticed that there's areas closer to the engine where the painted surfaces have bubbled a bit. Unfortunately, access is such that I can't splice fresh line...

This video is an interview of Bill Martin (Martin wikipedia link) (one of the godfathers of modern origin of life chemistry) by Jitender Kumar about several origin of life issues. He has a lot chemical knowledge and expresses it clearly. Interesting to me, he places the formation of membranes...

Former USA President Jimmy Carter seems to be near the end of his 98 years, and was one of the original US Navy nuclear engineers. Over 70 years ago, he led a team that extracted out the world's first melted down core out of a Canadian reactor, himself going 90 seconds into the "dead zone" -...

Recently the James Webb Telescope discovered an exoplanet 99% the size of Earth. Its name is LHS 475 b. What is the probability that there is life on this planet?

I'm sorry I'm uploading lots of images because I don't know how to write equations here. PROBLEM DESCRIPTION I have to solve this problem: Figure P3.6: MY SOLUTION I did this: THE CORRECTION I got this as a correction: - Don't use the middle line in figure P3.6 in my calculations. -...

So for this question, I understand the math but just wanted to be clear on a few things. So I had this question on my midterm but instead of tensile and compressive stresses, it was tensile and tensile stress. I initially thought that the delta sigma in the integral was the maximum stress so in...

Whenever I am posting anything related to "life" it got deleted! Does life not related to physics??

From my point of view: 1) survival 2) do something good to satisfy your inner soul and for others. 3) help to continue the race of human being 4) and die What others think about life?

Along with the endless complexities of life and the evolution of life, it occurs to me that at all points there had to be enough available nutrition for existent life forms - and that food supply itself had to go through a process of evolution. It seems self-evident that the environment of early...

I am of the total understanding that most astrophotography pictures are not a real representation of what objects actually look like... I guess I mean, it is not an accurate representation of what things would look like if you were actually the same distance closer as the picture's magnification...

I'm interested in chemistry but it's all new for me and I'm just starting out. I tried to do some calculations but got stuck... I was wondering, for example a supplement has the following values: Molar mass: 306.247 g mol-1 Tmax 2-4 hours Cmax 363.3 ng / ml Half life: 11.21 hours How do...

Got interested on how plants (and other things such as fungi) could evolve on other planets along with how plant life may flourish depending on the position of the planet to the sun, moon etc. I'm looking for any article talking about this or something similar.

Not sure to ask here or in Physics/Cosmology. How could life have begun much less evolve (or even planets form) if according to the 2nd Law of Thermodynamics entropy always increases with time?

https://www2.gwu.edu/~phy21bio/Reading/Purcell_life_at_low_reynolds_number.pdf “It helps to imagine under what conditions a man would be swimming at, say, the same Reynolds number as his own sperm”

What do you think is the meaning of life? My answer is two folded: The special meaning of life : After living almost 50 years on this planet and on the plane of the physical reality, I concluded that the meaning of life is to apply various laws in your life. The most important laws for me...

Here is a link to a recent (and good) Sean Carroll podcast with Nick Lane. I consider Nick Lane to have one of the most interesting views of Origin of Life issues. I consider his perspective to be biochemical and biochemical pathway heavy, which is very useful for these issues of...

Hi, do you think that reducing Boric acid concentrations at the begin of the cycle would extend the like of the fuel assembly?

Deadline April 18, 2022 Competition Eligibility at: https://www.drivendata.org/competitions/93/nasa-mars-spectrometry/rules/ HeroX Challenge page: https://www.herox.com/MarsSpectrometry Brief article: https://www.space.com/nasa-mars-habitable-herox-competition Good Luck, and have Fun! Tom

Could this be a good essay for school or college children to write a essay on "Life without Mobile phones today" as the essay title? The Mobile phones (Wireless technology) has impacted our lives and its hard for us where once upon a time we were using land line phones (wired technology) and...

I am studying IS but I am yet to find an example of IS. Is database IS? Is expert system IS? What is example of IS? And this question came to me while studying about this issue-: is security policy same as security methods? justify your argument with appropriate example of Information system...

I have a 6 years old MacBook air, still running the OS of a couple of years ago. Lately, battery life is going down (around 4.5 hours of light/medium use) so I mainly use it as a desktop computer, connected to an external monitor. However, when I leave it in sleep mode (still on, but shell...

1) Really messed up my uni life. Indulged into various addictions like addiction of making money online. making free money. wasted almost 3 years of uni life in it. 2.5 years to be exact.. Didn't keep notes of any subject even though i passed subject with ease as I had good track record of being...

hello: I don’t know where to post this and I think this is as good a place as any here. question: does quantum entanglement explain how we are? I am having trouble Even trying to express the question above. But, I just viewed PBS space-time series 6 episode eight: “how do quantum states...

Here are two pictures attached. The first picture is a photo from Russian secondary school 1967. The second picture is a painting by an American artist Norman Rockwell. He used the photo as a sample. There are ordinary children at the photo, the girl laughs. At the painting the children stare...

https://www.physicsforums.com/threads/regret-induced-jealousy-how-to-deal-with-this.1011135/#post-6586239 I made a post this few days ago but I believe this is different than that post. How do I get over this? I wasted time trying to make online income, creating blogs. I didn't realize full...

I had a lamp that was good for 10 years but two years ago it was burnt out, I replaced it and in this two years we have a naughty kid playing with it, it is burnt out recently again. Is it likely due to his behavior (switch it ON and OFF within short time) or quality of light bulb in recent...

I am considering writing a story that features aliens indigenous to a planet orbiting a red dwarf star. Even so, because of its proximity to the red dwarf, the planet's surface receives much more radiation than Earth's surface does. What is more, the planet has no moon to stabilize its...

I want to calculate the kolmogorov complexity of n evolution of a game of game of life(game of life is a kind of cellular automata). I’m not searching for the complexity of a certain pattern of cells but for the total complexity of an initial set of cells over n evolutions. Does it make sense to...

Summary:: Like how is it possible that Earth was just perfectly made for life? It seems impossibly unlikely that Earth would be able to harvest life. I also heard that the moon is exactly 400 times smaller than the sun and 400 times the distance from each other, which makes solar eclipses...

Hi PF, I'm teaching a college level introductory course about planet Earth and we are briefly discussing the importance of water for life. This is not covered in our textbook but I thought it was important to cover. I found some good resources...

https://futurism.com/genesis-project-robots-seed-galaxy-life

Nothing I do seems to matter anymore and it is becoming nearly impossible for me to take interest in the world around me.

I'm seeing somewhat conflicting advice for storing supplements long term (longer than 5 years). First, supplements are supposed to lose their potency with age, but, minerals are supposed to be stable for a very long time- possibly even indefinitely. Looking at this list: magnesium glycinate...

$\tiny{6.1.01}$ this was a homework problem from Kilani High School The half life of silicon 32 is $710$ years. If $10g$ are present now how much will be present in $600$ yrs? find out $k$ using \$\begin{array}{rlll} &A=A_0 e^{kt} & &(1)\\ \textsf{make }A=5 &5=10e^{k \cdot 710} & &(2)\\...

As an aspiring physicist , it worries me to see most of the physicists and mathematicians leading a rather reclusive lifestyle.(which they tend to enjoy and I have no problem with that). I'm very social by nature; I enjoy going to parties, playing sports, going for a vacation and sometimes...

This might sound like a stupid question... Was installing something in my computer last night, gpu was stuck so I pulled with too much force, it just suffered a small chip on the PCB and is now dead. Made me think, humans/animals can lose limbs, organs, even half their brains, and still live...

Hello everyone, im new in the forum and this is actually my first post. I am not an expert of astrophysics but for sure a very curious person that hope to can get more knowledge about astronomy and physics in the next future. Its been kinda long time I am searching an answer to some questions...

where are fixed beams used in real life? having real trouble googling them ad finding examples apart from buildings.

I'm not sure this a strictly Astronomy question; perhaps it should go in Aerospace Engineering. I have always thought that Dyson's work was more of an Astronomy topic, although admittedly, from the POV of observing some other system's sphere. In any case, I was thinking about future...

There are companies that specialize in cryogenically freezing a person as to treat ailments in the future that aren't yet treatable today. I know there are some preppers here; but, no neologism for cryogenic freezing really exists, maybe cryogenics? Would you ever cryogenically freeze...

I understand entropy as a movement from order to less order and that the universe's entropy is increasing. So I was wondering, life takes molecules and organizes them into organisms, so isn't life a reversal of entropy?

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