This is the 2016, revised edition of this fabulous book. In this edition, Richard Dawkins is a co-author with Yan Wong. This is a very hefty tome, just under 800 pages. It is a marvelously inventive, masterful look at evolution, as seen from the point of view of homo sapiens travelling backwards in time, back to the dawn of life. Each time the route of evolution reaches a branch point with another species, it is called a Rendezvous; there are 40 rendezvous altogether. The book is extremely interesting and informative. Below I summarize some of the interesting facts I learned.
Some creationists point to the so-called gaps in the fossil record as proof that the scientific theory of evolution is not sufficient to explain the development of species. But Dawkins argues that even without any fossils, the evidence for evolution would still be immense. The distributions of species on continents and islands, the patterns of resemblance, an genetic sequences are sufficient to prove evolution. Fossils are a welcome bonus. The gaps in the fossil records are not all that important.
The agricultural revolution helped to support a larger population, but did nothing to increase people's health or happiness; in fact it did just the opposite.
There is a very interesting discussion about our most recent common ancestor. That is to say, the human who is the common ancestor to all people alive on Earth today. It is very surprising, that the most recent common ancestor lived around 10,000 years ago.
Silver foxes bred in captivity by D.K. Belyaev for twenty years were bred for tameness. After twenty years, the foxes behaved like border collies! They became friendly, sought human company, and wagged their tails when approached. They even looked like border collies!
We were told when we were young that eating carrots help us see better in the dark. But this was a rumor started by WWII strategists to avoid revealing the secret of radar.
The best analogy for genes is not that they serve as a blueprint, but rather that they serve as a toolbox of routines. So, while a large percentage of our genes is in common with those of other animals, our main difference from other animals is not the toolbox of DNA routines, but is instead the pattern of choosing genetic routines from the available toolbox. This is called the science of epigenetics, which has been around since Conrad Weddington coined the term in 1942.
In 1866, Ernst Haeckel announced that the hippo is a close relative to the whale. This has since been proven through DNA; the hippo's closest living relative actually is the whale!
The duck-billed platypus closes its eyes shut when hunting for food. Its duck bill is a very sensitive organ with 60,000 mechanical and 40,000 electrical sensors. The platypus swivels its bill back and forth, feeling for impulses from potential prey. It probably gets a detailed 3D image of electrical disturbances in its vicinity. It probably is doing some sophisticated beamforming to increase its sensitivity.
Dawkins remarks about a lot of interesting speculations why humans are bipedal. He gives a number of arguments both why bipedal walking is helpful, but others why it is not.
In 1954, the British Colonial Administration destroyed the ecosystem of Lake Victoria. Against the advice of biologists, the Nile perch was introduced to the lake, which destroyed fifty species of cichlids, and critically endangered another 130 species. This newly introduced predator had caused devastation to the local economies around the lake. This is the reason why bureaucrats should not try to play God, and play around with ecosystems.
This raises the question, how did so many species evolve in the lake, in the first place? Dawkins makes some interesting speculations about how various species could be physically isolated in the lake, in order to allow the species to branch out due to evolution.
Dawkins makes a strong effort to avoid repeating stories that he told in other books. Instead of repeating them, he makes references to his many other books, for the reader to see additional examples. This is so different from that of many other authors, who often repeat themselves from one book to the next.
A variety of human inventions were anticipated in the animal kingdom. Some examples: echo-ranging (bats), electro-location (duckbill platypus), dam (beaver), parabolic reflector (limpet), infrared sensor (snakes), hypodermic syringe (wasp, snake, scorpion), harpoon (cnidarian), jet propulsion (squid). The wheel and axle was also anticipated; the rhizobium has a true axle and a freely rotating hub, driven by a tiny molecular motor. Such a wheel could not evolve in a large organism, which would involve twisting blood vessels.
I personally loved the renaming of the concept of Intelligent Designers from "Argument from Irreducible Complexity" to "Argument from Personal Incredulity." The argument "says less about nature than about the poverty of your imagination."
Dawkins speculates about what would happen if the "tape of evolution" were to be re-run in the forward direction, starting from pre-Cambrian times? What would happen if it were re-run a statistical number of times? Or starting from an earlier or later time? This experiment has, in a sense, been done to a limited extent in isolated locations like Australia, New Zealand, Madagascar and South America. Also, evolution in has turned out very similarly when allowed to run twice. Eyes have evolved independently 40-60 times, using nine independent optical principles!Echolocation has evolved at least four times in four animals; toothed whales, oilbirds, cave swiftlets and bats. The venomous sting has evolved at least ten times independently. True flapping flight has evolved four times. Parachuting and gliding has evolved maybe hundreds of times.
These notes above represent only a tiny fraction of the thought-provoking concepts in this book. This is a challenging book to read, not only because it is so long, but because of the many complex concepts that are described. The authors even warn the reader at one point that certain pages can be skipped if desired. But the entire book is fascinating. With each species rendezvous, a fractal diagram portrays the branching, along with dates and contour lines; what a fabulous visual portrayal of the concept of evolution!