aging Definition and 93 Threads

Hello everyone! I’m a student with a deep interest in physics, and recently I developed a conceptual hypothesis that I haven’t seen addressed directly in scientific literature. It's something that ive personally searched at a lot of places for many years. Reddit, Stackexchange, YT videos but...

Show aging effects at the molecular level https://www.nature.com/articles/d41586-024-03105-x

I assume a lot of regular people on this forum are older(maybe not as old as me). I ran across an article that is interesting and I can personally attest to this. I work out at least 3 times a week on weight training and some some aerobics at home. I still maintain at least 90% of my peak...

Hi, I would like to ask for a clarification about the terms time dilation vs differential aging vs gravitational redshit. As far as I can tell, time dilation is nothing but the rate of change of an object's proper time ##\tau## w.r.t. the coordinate time ##t## of a given coordinate chart (aka...

My studies are motivated by the dream of eternal youth, and all the implications of eternal youth for society at large. Currently, my studies primarily revolve around the topics of telomere maintenance, and cellular senescence. My current theory for the attainment of eternal youth involves the...

Out of curiosity, how fast are the hands of the pros? I have timed an exchange between BJ/ALW and JD/JI that occurred at the Baird PPA in September 2022. The ball made the (about) 14 foot trip 11 times over 4.0 seconds, for an average trip time of 363mS (milliseconds). (Average speed of 26.3...

Hello, I am designing a centrifugal heat pump, which compresses air. I'm considering making the impeller from aluminum, probably from 7075, since the stresses rise to about 385 MPa when rotating at high speeds. The input temperature of the air is 85 degrees Celcius and output 125 degrees...

I can't seem to get my head around this. It's my understanding that time moves slower in the heavy gravitation than it does in space. So why to I read that astronauts age move slowly in space, where time moves faster, than the would on earth? I would think if time is moving faster, they would...

I recently read Michael Collins' excellent book Carrying the Fire in which, among other things, he describes the Apollo 11 mission to the Moon and back. After the astronauts returned and were quarantined inside an isolation facility, they spoke to President Nixon, and Collins remarks in...

Popular (short) version: https://neurosciencenews.com/fecal-transplants-aging-20522/ Research Report: https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-022-01243-wNow if I could only find a much younger doppleganger... Cheers, Tom

A precis of medical research about aging and aging reversal in mice: https://www.medicalnewstoday.com/articles/supplement-slows-aging-process-in-mice-and-possibly-humans#Understanding-the-importance-of-mitochondria [Mitochondria background] Mitochondria are organelles in cells. There is a lot...

Seems to be partially a reversible auto-immune situation. So far it is in mice and in-vitro for Humans; no Human-use-approved compounds exist. :cry: https://med.stanford.edu/news/all-news/2021/01/study-reveals-immune-driver-of-brain-aging.html

Changes in the body that come from space travel resemble growing older, providing opportunities to perform aging studies on astronauts. https://www.nmn.com/news/how-does-space-travel-affect-natural-aging Any validity to this?

if you could leave the planet, and wait a year in space... would you age much much faster than a person on Earth because the Earth was moving relative to you and you are out of Earth's gravity field [like a higher up clock]?

Summary: Gravity and ageing Hi I am new here, please may I ask, A celestial object creates gravitational pull, as the universe is expanding and accelerating, the spaces between objects unaffected by gravity, are they subject to ageing. A craft on a course towards an area would occupy those...

Hi there, I would like to know all the ways or what I can do that actually works when it comes to slowing down or stopping the aging process for human males in both the brain and the body. I am one of those people that want to stay as youthfull as possible and to live as long as I can so...

I am working in telecom company and they told me that they installed new system and then they told me the equipment will be EOS (End of Service) after 5 years. I was wondering that how the electronics equipment's age is calculated. If I strictly categorize my questions and explain the confusion...

Good Evening, I have a question regarding, what seems to be the only proven way to extend life-span, caloric restriction. There seem to be new studies coming out every other month showing that caloric restriction is very positively correlated with an increase in lifespan, as well as a decrease...

http://onlinelibrary.wiley.com/doi/10.1111/acel.12750/full The effect of lifelong exercise decreases the immune system's degradation with age. Lifelong cyclists were compared to more sedentary age-matched counterparts. Several markers for immune system activity level were found to be higher...

You might have seen this cartoon on the web. Is this just for laughs, or is there actually some truth to it? After a bit of research I've found out that Asian women, particularly Japanese and Chinese, indeed tend to reach menopause at a later age. Moreover, western women show more...

Are there any scientific evidence suggesting that athletes decline in athletic performance/abilities after reaching their late 30s? Such as in terms of speed, agility, reflexes, hand eye coordination, stamina and etc. If yes, what are they?

Let's assume time travel is possible and we are travelling. We jumped to a TARDIS sort of machine in August 26, 2017 and go to August 26, 2000 then lived there for 4 years until August 26, 2004. So when we come back to August 26, 2017 would we be 4 years older or be the same age we were before...

Let's assume time travel is possible and we are travelling. We jumped to a TARDIS sort of machine in August 26, 2017 and go to August 26, 2000 then lived there for 4 years until August 26, 2004. So when we come back to August 26, 2017 would we be 4 years older or be the same age we were before...

The hypothalamus is at the base (bottom) of the forebrain and is involved in hormones and regulation of body metabolism. The study described here proposes that the loss of hypothalamic stem cells is involved in loss of abilities in old age, perhaps through the loss of the microRNAs they spew...

We are looking into Experimental Modal Analysis in one of my classes at university. The goal is to measure the Frequency Response Function and from it determine the mass and stiffness modal matrices. But my question is the following: My professor is leading lectures with his measurements that...

Hi, Does anyone know if there are such characteristics that are tell tale signs of diode degradation? I'm not sure if diodes fail short or open, I'd have thought open, but I'm not sure. I was wondering if as a diode gets old the forward bias voltage might increase? Or the diode power loss per...

I’ve been told that “differential aging” and “time dilation” are two different things. I had thought that one was the integral of the other. Can anyone give a PRECISE (mathematical!) definition of each, what the distinctions are between them? Thanks. (How the heck am I supposed to know what...

So, if the male is age 30 and the female is age 28 with the sperm and egg, why isn't their baby starts at age 29? That means the DNA damage theory shouldn't happen, each male and female would give half of their chromosomes (23) created through meiosis and fuse them to form a zygote beginning at...

https://www.sciencedaily.com/releases/2016/03/160316194205.htm Supplementation with the molecule pyruvate increases the energy reserves in the brain of aging mice, and makes them more energetic and keener to explore their surroundings. Should this be trialed on humans?

Hey all, It's been quite a while since I've been on here, I'm an IT Technician and recently lost a student to brain cancer at the age of 11 so i thought I'd brainstorm until i worked out a possible and feasible way to beat cancer, this might be sci-fi or false information as I'm not entirely...

If you where in an alternative environment would a different number of hours affect aging, compared to someone in the regular world. At first though you'd think likely yes, but then consider that the body has a rythm. This isn't exactly a entirely theoretical question, I know submarines...

I know there are similar threads regarding the topics above, but which method do you think is more achievable within the next decade? With the current ways of supercomputer and computing in decoding DNA as well as brain mapping, it might be a possible reality in the future.

Hai pf, yesterday i asked a question to my friend that "I had heared that people who were traveling to space may have a slight age difference is it true? assume if i and my friend are of age 30. i got a chance to travel to space. and i was returning to Earth after 5 years. then my friend who...

The older I get the worse my cardio-respiratory system becomes. I don't want to take too much exercise everyday (I am both lazy and a little "fat", my leg bones I think are no longer as good as they used to; I feel the pain even after running in a short distance; I breathe heavily after that...

Hi all, First post here. I have been debating with a colleague today about time dialation. I am certain that an astornaut in space will experience more time or age faster than people on Earth due to time dilation of a massive object. He is saying that he will come back younger. Whos right...

Hi! If you started a 50 light-year journey at the age of 20, traveling at 99.9% of the speed of light, would you look like 70+ years old when you arrived at the destiantion? How much would you have aged? And how would you experience the time on the spaceship? Would it feel like 50 slow years...

Can an aging microwave oven reaching the end of it life result in a change in its power draw? I've had this microwave for many years, and I know they do wear out, but it has begun blowing a breaker when used. I can't think of any changes to our electrical draw in the house that might affect it...

To keep track let's take a trip to 'Imagination Land' (no not the south park version!). Now imagine that the 8 planets and pluto in the solar system are places where humans can live, would the age rate differ from planet to planet? Now let's get back to reality. We may be able to send humans to...

Einsteins special theory of relativity states that time passes differently for different observers. Basically the faster you travel the slower you aged. So I assumed this means to aged the fastest, you don't move. We also know Earth is moving around the sun. The solar system is moving upward...

Saw this article posted on facebook, http://news.nationalgeographic.com/news/swapping-young-blood-for-old-reverses-aging/ and one of the papers they refer to, http://www.nature.com/nm/journal/vaop/ncurrent/full/nm.3569.html What do people think about this? I thought the affects of...

Hi, I know there are already other posts about extremal aging, but all of them are actually closed and none of them is actually answering to my doubt. I've just started T&W "exploring black holes", and I just faced the "extremal aging" principle. Actually, this concept doesn't fit very well...

Hi Suppose an astronaut is accelerated to the speed of light (OK to one part in a million less than the actual speed of light ) and makes a journey to the event horizon of a black hole that is ,at the outset of the journey and hopefully also when he reaches it) 100 light year distant...

Hi everyone, before I post I apologize for my bad English! I am not a physicist but I am interested in this stuff (I've read relativity theory and...) But I have a question regarding time traveling Imagine that it is true that we can travel at speed of light...So here is the famous example...

http://en.wikipedia.org/wiki/Twin_paradox I read a little bit about this, and am a little bit confused. I always learned about reference frames. When I jump, you can say that I am moving away from the earth, or the Earth is moving away from me. Why is this any different for near-light travel...

Given: a ~3W monocrystalline solar panel, originally from a panel+battery+light pack from early 90s, spent a decade in a box, then a decade on the roof under the sun and elements, unconnected to anything. I wanted to finally put it to some use. The circuit is straightforward - the panel...

Hello! At work we have an UV aging test chamber that produces around 140 W.m^-2 UVA 15 W.m^-2 UVB and less then 1 W.m^-2 of UVC. The chamber is big, we have to go in and out to collect the items. Is it possible to have ozone formation or other harmful gases inside the chamber?

The time dilation effect on a lightclock moving horizontically is very easy to understand. But how does the speed affect our biological processes? "Because time slows down!" you might say. But specifically, what does make say the cells move slower? If they are moving in the same direction of a...

One of the classical consequences of relativity is that if someone travels far away from Earth and comes back, he would have aged less than people here (acceleration and thus changing frames of reference being the reason.) So, why wouldn't this work also for shorter distances? If someone runs...

This topic is to clarify about related but possibly different terminologies. Based on a number of posts in the forum, including some in response to my posts, I am getting the feeling that there is a difference between the terminologies time dilation and differential aging, as stated below...

Question about Aubrey de Grey's "Ending Aging" theory. So he wants to increase the life expectancy of people, but I think there is no way this medicine will be available to everyone because increased population will have so much negative impact on the environment, economics, and many other...