Srini Chandrasekharan


Tag: science

  • God Delusion by Richard Dawkins – A Review

    God Delusion by Richard Dawkins – A Review

    “God Delusion” is a bestseller non fiction book, written by Richard Dawkins, a professor at Oxford.

    The primary purpose of the book is to debunk the Judeo-Christian notion of God as a “superhuman, supernatural intelligence who deliberately designed and created the universe and everything in it, including us,” which Dawkins calls the “God Hypothesis.” His argument against this hypothesis is that a God with such abilities has to be more complex than what it has created, and hence improbable. He then raises the reductio ad absurdum question of who created God. In fact, this elaboration on the “Mommy, who created God?” question is the central argument of the book.

    Dawkins’ argues that science and religion are mutually incompatible for the reason that science is all about evidence, while religion is about believing without evidence. He makes the point “morality needs no religion,” which, frankly, has been said before. He stands on the shoulders of Bertrand Russell when he says this.

    My observations from reading the book

    Dawkins treats “believers” with little respect. e.g. calling them ‘faith heads’ to make unwarranted, implied comparisons with ‘crack heads’. This is not necessary. On the other hand, religion has become accustomed to getting respect. So, maybe a little disrespect is not a bad tactic to get attention. Agree with his real point that there is no reason why religion should be immune to criticism or get any special treatment.

    Dawkins blames religion disproportionately. Reading the book – one would be tempted to believe that if religion were to be somehow obliterated, all the world’s wars would cease. Rather dramatic and flawed since things like language and good old megalomaniacal tendencies have contributed more to wars than religion. I get the sense that Dawkins is hung up more on labels rather than religion or God itself, and is stretching to make the linkages. his point really is that religion is a ‘marker’ much like tribal membership, language, skin color etc except that we’re giving it way more (undeserved) respect than the other markers. This is a fair point but not a very useful one.

    Dawkins recommends impractical and absurd measures like “children should not be given the religious labels of their parents”. Again, he unfairly picks on religion, since non-religious beliefs of parents play possibly an even more important role in deciding children’s future development. Further, children tend to grow out of their parents’ belief systems as they have experiences of their own

    Dawkins makes no distinction between ‘liberals’, ‘moderates’ and ‘extremists’ in religions. This may not be a minor point. Just like – not all atheists are pacifists (eg Stalin, Mao), not all theists are pacifist. So why, again, isolate religion as a sole culprit?

    He is unable to pin down what he really feels is wrong with or does not makes sense about religion from an evolutionary perspective. Dawkins would be the first to admit that religion has a “utility” value in evolution, although he would qualify this by saying “even false beliefs have utility value.” False belief or not, religion’s utility appears to be there. So, what’s the problem with this? Why the hysteria against religion? This is especially disappointing given his strengths in this area.

    The Verdict

    Dawkins brings a great deal of passion to the book, but reading it can feel like watching a Michael Moore movie. His tone is smug, logic sloppy at times and the book occasionally includes crass phrases like “sucking up to God”. When it comes to his own specialty, evolutionary biology, there is none better. But the purpose of this book is not to explain science. It is rather, as he tells us, “to raise consciousness,” which is quite another thing. The book ends up being a unscientific polemic, in which an evolutionary biologist stretches into areas like socio-economics, politics, history, philosophy, theosophy, theology etc. where he has no core expertise. For a person who does not believe in God, he appears more obsessed with Him than the believers.

    Dawkins puts forth that to be an atheist is a “brave and splendid” aspiration. On a scale of 1 to 7, where 1 is certainty that God exists and 7 is certainty that God does not exist, Dawkins rates himself a 6. “I cannot know for certain but I think God is very improbable, and I live my life on the assumption that he is not there,” he says. An assumption, not coincidentally that has fetched him millions of dollars.

    If you’re looking for a “good atheist” book, this one’s not it.

  • What is the Higgs Boson?

    What is the Higgs Boson?

    Today (July 4, 2012), scientists from CERN in Europe announced that they may have found clear signs of a particle which is thought to be the Higgs boson, popularly known as the God particle. The hardworking scientists aren’t getting ahead of themselves, and are not quite confirming the existence of the Higgs boson outright. They’ve stopped at saying that they have evidence for a new particle, which “must be a boson” and that “there is a high probability that this could be the Higgs boson.”

    What is the Higgs boson? Why is it called the God particle?

    Is there a simple way to describe this without doing gross injustice to the years of work and thought that has gone into it? Not really, but what ho! plunge into it we shall, in any case.

    All matter is composed of fundamental particles. In fact, scientists have uncovered twelve particles that can be described as building blocks of matter. There may be more yet to be found. As of now, there are twelve. Out of these twelve, three (electron, up/down quarks) are considered even more fundamental for the reason that everything else can be constructed using a combination of these three. In other words, a few basic particles combine in various possible ways to create higher level particles. Higher level particles get together in other possible manners and shapes to form chairs, cats, people and plants, which have perceptible mass. I think we should leave this at that, for fear that if we go any further, our brains will begin to tie themselves into knots.

    Long story short, there are a small number of sub-atomic, “massless” particles which combine mysteriously to form matter. Mysteriously? How do an electron and an up quark decide to form a neutron? What is it that triggers these combinations causing matter to be formed?

    This is where the Higgs boson comes in. Peter Higgs, a British physicist, came up with the theory that there *had* be this even more inscrutably mysterious particle that catalyzed interactions between the fundamental particles, which results in matter being formed. He and later scientists have envisioned this “thing” as sort of a massless wave that exists everywhere. When other particles interact with this energy field, if you will, they combine and begin transformation into matter. Whew! Hope that made sense. This theoretical particle was named the Higgs boson, in honor of its postulator, and the popular media began dubbing it the “God particle” due to the powers of creation ascribed to it.

    How do you prove something called the God particle exists?

    For a good part of four decades, the Higgs boson has remained a theory in search of proof. Speaking of proof, how exactly do you go about proving a thing like the God particle? Well, here’s how it roughly works. You have two models. One which says, “Yes, there’s a Higgs boson”. And another that says, “No, there isn’t.” You let each model to make predictions on effects that can be observed. An example of an observable effect is what happens when two particles are smashed into each other, otherwise known as a “particle collision.” So, scientist conduct collisions and record the data from the collisions. And then they check to see if there are observable differences between predictions of the two models. In this particular case of the Higgs boson, the difference predicted between the models is incredibly tiny. Since this difference is so small, bajillions of data are needed before you can come to a statistically significant conclusion. All of this also means you need apparatus that can generate enormous amounts of energy required to conduct particle collision experiments.

    This is where the CERN labs in Europe came in. They spent billions of dollars in building the Large Hadron Collider, designed to go in search of the God particle. And, they have been running 40 million collisions a second, all day for the entire year during the last two years.  And, it looks like they have finally found something that looks like the God particle. Amazing stuff.

    So, what does this all mean?

    First, it is a reflection on this day and age that we have to hold a press conference to cautiously announce that we may have discovered the God particle. There is something indefinably amusing and ironic about this act. That we who have been created by the God particle are not yet sure if our creator exists! This drama appears filled with even more irony when you consider that a large majority of people on this planet are unlikely to even notice this announcement regarding their creator.

    Cartoon on reactions to God particle announcement

    Having said that, the quest for figuring out how it all got started just got a whole lot interesting. We’ve all heard that the universe started from nothingness and exploded into what we know as the universe with a big bang. The one thing that has mystified scientists about this theory is the question, “How and why did matter form after the big bang?” The Higgs boson, if proved, gives them something to stand and build on.

    The day is not too far when CERN scientists will be able to confidently confirm that the God particle does exist. And then will come the question, “Who created the God particle? And where did it come from?”

    Picture, my friend, abhi bakhi hai. Get some popcorn, sit back on the couch, make yourself comfortable and have fun watching! Cheers.

  • This beautiful thing called empathy

    This beautiful thing called empathy

    Last Sunday, I watched a a fascinating conversation between His Holiness Dalai Lama and a group of scientists, titled “Neuroscience and the emerging mind,”. The dialogue revolved around the questions of “what triggers empathy?” and “can we be trained to be empathetic?”. I spent an hour watching the scientists and the monk in rapt attention. Here’s a gist.

    Empathy is the ability to view the world from another’s perspective. Of all emotions, it’s empathy that makes us human. Some would even say it’s empathy that makes us divine. So how exactly does empathy work from a neurological perspective? Prof. V. Ramachandran at University of California, San Diego explains it nicely. Not a surprise since he’s been researching this topic for over two decades. Here’s my understanding of what he’s found.

    The brain, at its core, is a mushy mass of gooey tissue filled with a massive number of neurons. The cerebral cortex is the largest part of the brain, and contains 10-13 billion neurons. What are neurons? They’re cells that excitable. When they’re excited, they transmit information through electric signals. When you lean forward to pick up a cup, there’s a neuron in your brain that fires and coordinates the motor movement of the arm stretching, fingers clasping the handle and the hand picking it up.

    What made things more intriguing was the discovery of what Prof. Ramachandran calls “mirror neurons”, found in the cortex. Mirror neurons fire when *someone else* performs an action that you’re familiar with. In other words, a mirror neuron fires in my brain when *you* lean forward to pick up a cup. And soon after its firing, my hand signals back to the brain saying “It’s not you picking up the cup. It’s the other person”. All of this happens reflexively in the background. Amazing stuff.

    Mirror neurons are the agents of empathy in the brain. When you see another person being pricked with a pin, you flinch reflexively because of them. Your finger quickly sends a message back saying “safe” and that’s how you realize that it’s not you being pricked. In experiments performed on folks with prosthetic arms, subjects actually experienced pain when watching another person being pricked. That’s because their arms lacked cells to transmit “safe” back to the brain! Suddenly, the question of – can we be “trained” to be empathetic? – doesn’t appear out of bounds!

    All this talk did leave me a tad uncomfortable. It’s as though we’re trespassing noisily into a sanctum where one must tread with respect. The strength of science lies in its irreverence, which keeps it moving forward and from settling in a comfort zone. That just might be its Achilles heel as well. Science seeks to discover so it can manipulate and control. Any quest based on the notion of “how can I control what’s going on”, I believe, will fail ultimately. Action-without-agenda has far higher staying power, resilience and chances of achieving its goals than action-with-agenda. This is what eastern wisdom tells us. And that’s what His Holiness Dalai Lama subtly conveyed to the professors in the room.

    Empathy is a beautiful thing. It holds the key to happiness. Forcing it upon another violates the idea of empathy itself.

    ps: This was a great way to spend an hour on a Sunday morning. Check out the video when you get a chance. cheers.

  • On the Nature of Light

    On the Nature of Light

    Light is at the core of physics. Light, its attributes and energy, define the very parameters of this amazing universe that we find ourselves in. The nature of light, also (less commonly) known by its scientific name – electromagnetic radiation (EMR) – is the most fascinating conundrum we have encountered in nature. Light is the two-faced Janus, connecting our past, present and future, and, for mysterious reasons, can behave as either a ‘wave’ or a ‘particle’. This is no ordinary matter. How light can behave at times like a “particle” – something that has “mass” and confined to “finite amount of space”, and on other occasions, as a “wave” – something that is formless and existing everywhere simultaneously – is one of the most captivating mysteries that science is yet to solve.

    On the Nature of Light

    Long before before great scientists like Aristotle, Galileo and Newton came along, humans had grasped the mystical importance of light, in a philosophical and religious sense.

    Psalms 119:105  (Holy Bible, King James Version):  “Thy word is a lamp unto my feet, and a light unto my path”

    “Seeing the light” came to be equated with wisdom and enlightenment, and with receiving the ultimate expression of God’s benevolence. A dark universe, devoid of light, was considered a universe devoid of itself – a universe that existed without form or purpose until – as the Holy Bible tells us – “God said, Let there be light”. The Holy Koran says, “Allah, (Praise be to his name) is the light of the heavens and the earth”. The Rig Vedantin prayed “Lead me from darkness to light, from the unreal to the real”. The ancient savants intuitively grasped the quixotic nature of light, a baton which science has only recently taken but carried resolutely over the last hundred years. (more…)

  • Can neutrinos travel faster than light?

    Can neutrinos travel faster than light?

    Scientists in Europe claim that they have observed neutrinos traveling faster than light. What are neutrinos? Why is it surprising that they can travel faster than light? What’s the big deal?

    Neutrinos

    What are neutrinos? They are sub-atomic particles – little wisps of almost nothing, with no electrical charge. Being neutral, they are found nearly everywhere and can pass through matter unabsorbed. If you hold your hand toward the sunlight for one second, about a billion neutrinos from the sun will pass through it.

    These “ghost particles”, as they’re often called, are part of the universe’s essential ingredients, and play a critical role in helping scientists understand some of the most fundamental questions about the nature of matter and in crafting a picture of how our universe formed and evolved.

    “Whence this creation has arisen. Perhaps, it formed itself, or perhaps it did not. The one who looks down on it in the highest heaven, only he knows, or perhaps he knows not” – A hymn from the Rig Veda

    A group of scientists working at CERN (European Organization for Nuclear Research) – among other things – have been attempting to measure the velocity (or speed) of neutrinos, by shooting these particles through an “accelerator” (sort of a long tunnel built underground). In their experiments, the group found that neutrinos were arriving at their destinations earlier than expected. Startlingly, they appear to be traveling faster than light itself. No definitive conclusions have been drawn yet. The results will have to be examined by a wider group of scientists before they can be confirmed or deemed wrong.

    Speed of Light

    If we were to view the exquisitely intricate design of the universe as a “program” with some of the parameters as “fixed, constant and coded in” and everything else as “variable, relative, dynamic and subject to change”, the only constant (that we know of) is the speed of light (‘c’). Why is the speed of light constant? It just is. We don’t really know why. And light travels at slightly more than 186,000 miles per second. All we know or can say in this regard, is that our measurements till date have not disproved that assertion. It’s the way things work in this particular version of the universe that we find ourselves in, to the best of our knowledge. That light never slows down or comes to a rest and is always moving at a constant speed. This assertion forms a critical basis for Einstein’s Theory of General Relativity.

    Einstein’s Theory of General Relativity

    The simplest way to explain this is to say that “nothing is absolute” or “everything is relative”. So, immediate answers to any question posed are “it depends” and “compared to what?” For example, a train said to be moving at 60 kmph is relative to a stationary observer on a platform, and not relative to another observer on another train moving in (say) the opposite direction at 70kmph. Everything in the universe is in motion or at rest, *relative to something*. Galaxies with their stars are racing, planets and moons are revolving and rotating and indeed the universe itself is expanding. Grossly simplified, the theory of general relativity is a framework that explains everything as relative and subject to a frame of reference with the notable exception of two things – the speed of light and the laws of physics themselves – which hold steadfast no matter whether you are in San Francisco or in some dark, uninhabited corner of the universe.

    Einstein’s theory of general relativity is magnificent for many reasons. In particular, it is awe inspiring for the reason that it tells us that “time itself is relative”. Time itself moves faster or slower depending on the velocity of motion, a mind boggling notion. Clocks slow down when you move faster. Of course, this is not noticeable at speeds we humans move around at normally. The “time dilation” effect kicks in only when we can get to speeds resembling that of light.

    Why the fuss about the CERN finding?

    It’s tough being a sub-atomic particle these days with scientists constantly tracking your every movement and accusing you of some misdemeanor or the other. If it turns out to be true that neutrinos have been caught breaking the “speed limit of the universe”, the implications are profound at a fundamental level. No, it will not change the way we live in any way. The sun will still rise in the east. Our lives will weave their ways inexorably through to whatever lies ahead. We will continue to fight our daily battles, wage our petty wars and live our lives ordinarily as we did yesterday and the day before. It won’t tell us if there is a God who designed it all. It won’t tell us otherwise either. Yet, everything would have changed. Einstein once said “Time is just a mechanism that ensures that everything doesn’t happen all at once”. The future is nothing more than where light has not reached as yet, or in other words a past that is yet to happen. If something is found to travel faster than light, then notions of past, present, future, time, cause, effect, etc. become mysteriously murkier than ever.

    But, it will add a smidgeon of hope and joy that we would have inched forward in the quest for knowing. It will tell us that there is more afoot, more thrill to be had in this pursuit, and simultaneously give us pause to examine this wonder that we call life.