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by Robin Sharma
With Mind and Matter and Autobiographical Sketches
What is Life?, by Erwin Schrödinger, is an exploration of the basic principles of biology and physics. Written for a general audience, it explores the connections between genetics, thermodynamics, and quantum mechanics in order to understand the fundamental nature of life.
Schrödinger started off his lectures by asking his audience a simple question: Why are atoms so small? Or – and this is really the same question but from a different perspective – why are we humans, and all other living organisms, so ridiculously large compared to the tiny atoms we’re made up of? And just to be clear, atoms are really, really, really tiny. The size of a single atom ranges from 1/5000 to 1/2000 of the wavelength of yellow light. This is important because this wavelength is roughly the size of the smallest possible grain you can detect in a regular microscope – well, at least back in 1943, when Schrödinger delivered this lecture. So, even with the most state of the art microscope in 1943, the tiniest thing you could see would still contain thousands of millions of atoms!
So, why are atoms so small? Well, for any organism to function properly, it relies on its parts to behave in an orderly way and obey strict physical laws.
And this is precisely where things get a bit hairy, because, individually, atoms behave in a pretty disorderly way; they’re constantly vibrating and producing energy. In fact, the behavior of a single atom, or a small number of atoms, doesn’t obey any recognizable physical laws. It’s only when you have a large enough number of them that they start to behave according to statistical laws.
There are many examples of this. Magnetism is a good one. If you fill an oblong quartz tube with oxygen gas and put it into a magnetic field, the gas is magnetized and the oxygen molecules orient themselves parallel to the field like the needle of a compass. However – and this is important – not every oxygen atom changes its orientation. The atoms only orient in the direction of the field on average – as a group.
Alternatively, consider a light object suspended by a long thin fiber. Physicists often use these in experiments to measure weak forces like electricity and magnetism, which can work to alter the position of the body. As physicists experiment with lighter and lighter bodies, those bodies reveal themselves to be susceptible to weaker and weaker electric or magnetic forces. Eventually, the body performs a constant and irregular dance around its neutral resting, or equilibrium, position.
This example is especially helpful because it shows how the human body would cease to function if all the atoms inside it were constantly responding to all the forces operating on them at a given moment. For an organism to benefit from the statistical laws that govern large groups of atoms, its body must be large in comparison to its atoms.
What is Life? (1944) is a classic scientific text based on a series of lectures given at Trinity College, Dublin, by famous physicist Erwin Schrödinger. Though Schrödinger was a physicist, these lectures addressed issues in biology and genetics – primarily the fundamental question of how physics and chemistry can account for the processes that occur within living organisms. The concepts he explored went on to spark a revolution in genetics, inspiring, among others, the biologists James D. Watson and Francis Crick, who together proposed the double helix structure of DNA.
What is Life? (1944) by Erwin Schrödinger offers profound insights into the nature of life and its foundational principles. Here's why this book deserves your attention:
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Try Blinkist to get the key ideas from 7,500+ bestselling nonfiction titles and podcasts. Listen or read in just 15 minutes.
Start your free trialBlink 3 of 8 - The 5 AM Club
by Robin Sharma
What is the main message of What is Life??
The main message of What is Life? is to explore the essence of life through the lens of physics and biology.
How long does it take to read What is Life??
The reading time for What is Life? varies depending on the reader's speed. However, the Blinkist summary can be read in just 15 minutes.
Is What is Life? a good book? Is it worth reading?
What is Life? is a thought-provoking book that uncovers the mysteries of life. It offers a unique blend of scientific insights and philosophical reflection.
Who is the author of What is Life??
Erwin Schrödinger is the author of What is Life?.