A question is still asked: can we go back in time? The surprising thing is that some physicists are still tinkering with this question even when the answer is staring right in their face.
The key principle that applies to this question is not the equations and principle of space-time but the principle of conservation of energy. The total amount of energy in the universe is constant. Therefore, regardless of its quantum mechanical properties, the sum of the energy of all particles (visible or dark) and waves cannot change.
Energy has a powerful property: it is only found in its current state, with all previous and future states being bereft of energy and hence reality.
The concept of space-time block is mathematically correct but all states of space-time except the current state are physically non-existent.
Hence you can’t get real people (i.e. energy) into the past (or future).
Btw, I believe (this is only an unproven belief) that we have an infinity of universes somewhat similar to ours but with different characteristics. The energy within each of these infinity of universes is constant within that universe. Each of these universes exists in a “current” state in which its entire energy actually exists in particular forms. All previous states are not real after that moment has passed.
Due to the accident of his commenting on my TOI agriculture article, I found time to study the work of CS Prakash, and I’m deeply impressed.
I wonder how I missed getting to know about him and his work till now. I suppose I’ve paid more attention to economists of Indian origin than to scientists – since from my experience most scientists are completely ignorant about basic economics. But here’s a biologist who – unlike MS Swaminathan – is really good in economics. I presume that’s why Liberty Institute invited him to deliver the 2003 Julian Simon lecture (I’ve requested a copy of the lecture from him and will post it on my blog etc. if I can get hold of it).
As expected, he is also a strong votary of GMO and recently retweeted this.
I’m delighted to discover CS Prakash and look forward to finding out more about his views. If only we had scientists like him in India.
At the minimum one must thank Thomas Jefferson and colleagues who helped create a free nation to which people like CS Prakash could go to, even when they were oppressed within their own nation.
As Prakash has noted about India in a tweet: “800 years of outsiders-ruling have conditioned us many Indians to be slavish to the statist state & made us look up to the government for everything allowing politicians & bureaucrats to be paternalistic. I grew up in the 60s where we were taught ‘Government is God’ in schools!”
Strongly encourage all SBP members to follow Prakash’s work. We would like to involve him in SBP’s agricultural policy development in the coming years.
We know that when a child is born about half its brain cells will die within the first year. This death (probably of the cells that were not “used” sufficiently in the first year) is critical as it creates the extra space within the brain for the massive number of new connections that are forming.
SLEEP CLEARS THE MIND: HOW SLEEP PREPARES THE BRAIN FOR NEW LEARNING [“sleep also makes room for the formation of new memories, acting as a sort of “spring cleaning” for the brain. The idea that sleep may help balance brain resources and space is known as the homeostatic theory of sleep. .. Sleep prunes out unnecessary connections between cells, freeing up resources and space for new learning to take place the following day. “]
OLDER PEOPLE NEED A FULL SLEEP AS WELL: “Most adults need around 7–8 hours” [Source]. Further, “contrary to common myth, the need for sleep doesn’t decline with age but the ability to sleep for six to eight hours at one time may be reduced” [Source – American Psychological Association]
“More than 20 large scale epidemiological studies all report the same clear relationship: the shorter your sleep, the shorter your life.”
“once people know of the powerful links between sleep loss and, among other things, Alzheimer’s disease, cancer, diabetes, obesity and poor mental health, they will try harder to get the recommended eight hours a night ” “In his book, Walker notes “unscientifically” that he has always found it curious that Margaret Thatcher and Ronald Reagan, both of whom were vocal about how little sleep they needed, both went on to develop the disease (Alzheimer’s)”.
“We have stigmatised sleep with the label of laziness. We want to seem busy, and one way we express that is by proclaiming how little sleep we’re getting. It’s a badge of honour.”
“‘I seem to be one of those people who need eight or nine hours’ sleep.’ It’s embarrassing to say it in public.”
“Sleep, it seemed, could be a new early diagnostic litmus test for different subtypes of dementia.”
“after just one night of only four or five hours’ sleep, your natural killer cells – the ones that attack the cancer cells that appear in your body every day – drop by 70%, or that a lack of sleep is linked to cancer of the bowel, prostate and breast” [I’ve been sleeping very little, so maybe this has been a cause of my prostate cancer]
I like the simple sleep machine these people have invented. It can (and in my view, it WILL) massively reduce the prospect of dementia/ Alzheimer’s.
I believe Matthew needs to emphasise in his talk the fact that EVERY NIGHT, when we have a good sleep, a little part of our brain connections are **destroyed** – like files on a hard disk being wiped out. This is a very good thing – and is essential to enable us to learn new things. The physical theory of the brain is excellent and explains virtually everything we know about ourselves.
It also explains IQ, which is nothing but dense connections of logic that are largely based on intense learning during childhood. IQ is totally cultural, but it purely reflects the density of brain connections. Everyone can build a high IQ through access to wide reading and learning + deep sleep.
Till my 30s I had a fantastic ability to sleep. And that meant I had an exceptionally good short term memory for academic-type things – acing all academic exams (also putting me at the top-end in terms of the culture specific concept of IQ). Since then my sleep quality has deteriorated, which explains why my memory is not as good as it was before. Each night I’ve been pushing sleep till later, then getting up earlier. That’s really harmful in the end.
My observation: High IQ people have higher sleep spindles – these are precisely things that the new sleep machine can enhance. – a very intriguing opportunity to enhance the reasoning ability of the world.
ADDENDUM – FURTHER THOUGHTS
What is jet lag but the lack of appropriate clearing out of the unnecessary synapses?
HOW TO GET DEEPER DEEP SLEEP
Here’s something under development (a Ted talk by Dan Gartenberg)
I made this video originally in one go but it appears I bumped into the 20 minute limit of my DSLR and therefore had to start again in the middle. Next time around I’ll try to reduce the quality of the video – apparently that allows a 30 minute session without switching off.