Close Encounters with Humankind: A Paleoanthropologist Investigates Our Evolving Species by Sang-Hee Lee
“The One Thing You Need to Know” is a wonderful book that examines twenty-one ideas in science. Award-winning author and scientist Marcus Chown provides readers with the one thing you need to know about some of the most interesting ideas in science. This instructive 257-page book includes the following twenty-one chapters: 1. Gravity. 2. Electricity, 3. Global Warming, 4. Why the Sun is Hot, 5. The Second Law of Thermodynamics, 6. Plate Tectonics, 7. Quantum Theory, 8. Atoms, 9. Evolution, 10. Special Relativity, 11. The Brain, 12. General Relativity, 13. Human Evolution, 14. Black Holes, 15. The Standard Model, 16. Quantum Computers, 17. Gravitational Waves, 18. The Higgs Field, 19. Antimatter, 20. Neutrinos, and 21. The Big Bang.
Positives:
1. A well-written, accessible book with a touch of humor.
2. A great topic, a look at science ideas with a focus on learning one thing from each idea.
3. The book is educational and fun to read. The chapters are at manageable levels and intended for the general public.
4. Good use of graphs and illustrations to help reader comprehension.
5. Every chapter begins with a chapter-appropriate quote.
6. Explains the relationship between electric and magnetic fields. “The relationship between electric and magnetic fields can be stated precisely: a changing electric field creates a magnetic field and a changing magnetic field creates an electric field.”
7. The key to Earth’s warming. “In fact, without the most important of all the heat-trapping molecules – water vapour – the planet would be a giant ball of ice with an average temperature of only -18 degrees Celsius.”
8. Examines the sun. “The sun, we know now, is powered by the gluing together of the cores, or nuclei, of the lightest element, hydrogen, to create nuclei of the second lightest element, helium. The byproduct of this nuclear fusion is sunlight.”
9. Understanding the second law of thermodynamics. “The answer is that the second law merely dictates that entropy must increase overall. This does not rule out the possibility of there being localized pockets where entropy decreases.”
10. The little known importance of plate tectonics. “Given that the constant burying of carbon dioxide by plate tectonics stops the build-up of the greenhouse gas in the atmosphere, the process may have been responsible for stabilizing the Earth’s climate over billions of years. It may therefore have played a key role in the evolution of life, which appeared at least 3.8 billion years ago.”
11. Find out one of the most shocking discoveries in science.
12. Evolution that even a caveman can understand. “Crucially, Darwin realized, the only ones to survive to reproduce are those with traits that enable them to best compete for that food. And these attributes are inherited by the next generation.”
13. Special relativity in simple terms. “Everything depends on the relative speed of observers, hence the label ‘relativity’ to describe Einstein’s theory. The speed of light turns out to be the rock on which the universe is built; space and time but shifting sand.”
14. The key to understanding the brain. “This strengthening and weakening of connections between neurons or the creation of new connections to modify the network is known as neuroplasticity.”
15. The theory of gravity in terms that a layperson can understand. “The American physicist John Wheeler came up with a very neat summary of the essence of Einstein’s theory of gravity: ‘Matter tells space-time how to curve. And curved space-time tells matter how to move.’”
16. Black holes defined. “A massive star at the end of its life, when it had run out of fuel to burn and was no longer generating heat to push outwards against the gravity trying to crush it, would become a black hole.”
17. The Standard Model explained. “The Standard Model is a theory of the ultimate building blocks of the world and how they are glued together. It describes how everything – from galaxies and stars to people – is ultimately made from just twelve different matter particles, which interact with each other by means of three non-gravitational forces, the whole thing being bound together by a very special particle known as the Higgs boson.”
18. Quantum computing the future is now. “A quantum computer simply exploits the ability of atoms and their like to do many things at once in order to do many calculations at once.”
19. Antimatter. “Nature has chosen to double the number of its basic building blocks. For every subatomic particle, remarkably there exists an ‘antiparticle’ with opposite properties such as electric charge.”
20. The big bang theory is no joke. “The basic big bang theory, in which the universe began in a hot, dense phase and has been expanding ever since, with the galaxies congealing out of the cooling debris, is beyond dispute. However, over the years, its predictions have been found to contradict observations and so it has been significantly modified by adding a number of new components. The three main bolt-ons are dark matter, dark energy and inflation.”
21. Includes glossary and endnotes.
Negatives:
1. Despite the intent to make this book accessible, some topics are still difficult to comprehend. Topics to do with quantum theory as an example is beyond the reach of the average person even at its most basic level.
2. Meant for the masses so if you have any formal education in any of the topics discussed you can certainly skip it.
In summary, this is a fun and instructive book to read. Chown’s purpose is to educate the general audience by focusing on key concepts for each science idea presented. The addition of humor gives the book a softening touch but rest assured some topics are still difficult for the average person to follow. Twenty-one science ideas are examined and with my background in engineering I found the book to be accessible and fun to read. I recommend it.
Further recommendations: “Brief Answers to the Big Questions” and “The Grand Design” by Stephen Hawking, “Why Does E=mc2?” and “Wonders of the Universe” by Brian Cox, “The Skeptics’ Guide to the Universe” by Steven Novella, “Relativity” by Albert Einstein, “The Big Picture” by Sean Carroll, “Cosmos” by Carl Sagan, “A Universe from Nothing” and “The Greatest Story Ever Told – So Far” by Lawrence Krauss, “The Future of Humanity” Michio Kaku, and “Origins” and “Death by Black Hole” by Neil deGrasse Tyson.