Carl Sagan is arguably the greatest science writer and educator of recent times. In this book his mind, through his theories, is on full display for all to see. He steps through various evolutionary ideas about how man (and his brain) has evolved. Natural selection has served as a kind of intellectual sieve, producing brains and intelligences increasingly competent to deal with the laws of nature.

Another take down came in the form of a study published in 2022 in the journal Science. Researchers compared the brains of lizards and mice to see if similar neurons in both species were concentrated in certain areas of the brain. Countering the triune theory, they found that these neurons were scattered all over. There was no clear “reptilian” portion of the mammalian brain. Halfway through the book, Sagan talks about dragons and the meaning behind the book’s title. Although dragons are mythical creatures, there are real animals that resemble dragons, one example is the Komodo dragon–a reptile that can weigh up to 300 pounds and be 10 feet in length (oh and did I mention they are venomous?).Our brain gives us the ability to think about the future and focus on long-term benefits, but we get a lot of anxiety from it and from thinking about our inevitable end. Sagan discusses the search for a quantitative means of measuring intelligence. He argues that the brain to body mass ratio is an extremely good correlative indicator for intelligence, with humans having the highest ratio and dolphins the second highest, [1] though he views the trend as breaking down at smaller scales, with some small animals ( ants in particular) placing disproportionately high on the list. Other topics mentioned include the evolution of the brain (with emphasis on the function of the neocortex in humans), the evolutionary purpose of sleep and dreams, demonstration of sign language abilities by chimps and the purpose of mankind's innate fears and myths. The title "The Dragons of Eden" is borrowed from the notion that man's early struggle for survival in the face of predators, and in particular a fear of reptiles, may have led to cultural beliefs and myths about dragons. When keycap have enough time to get hard inside the pressure pot, the next step is cleaning and sanding to create a ultra smooth surface for each keycap. There are 4 step for sanding, and the very last step is create a glowing and clearly surfaces. In addition, we apply the method of color mixing by hand-painting and airbrush painting to create a more highlighted effect on these details. We also use UV lighting effects to bring vivid color to our entire dragon.

Campbell, David N. "Fascinating Popularization of Special Interest to Educators", Phi Delta Kappan (April 1978). Vol. 59, no. 8. pp. 567–568. JSTOR 20299094.Carl Sagan was, and to this day is, generally regarded as an honest and skeptical broker of scientific information. That he presented such a disputed theory essentially as fact to the lay public is a bit surprising. What’s more, Carl Sagan continued to push the theory three years later in his far more widely read book, Cosmos. He wrote:

The average human brain has 10 Dr. Carl Sagan takes us on a great reading adventure, offering his vivid and startling insight into the brain of man and beast, the origin of human intelligence, the function of our most haunting legends--and their amazing links to recent discoveries.A history of the human brain from the big bang, fifteen billion years ago, to the day before yesterday . . . It's a delight.”— The New York Times

One day, the six Descendants went through labour and laid fourteen eggs, among the great anticipation of the whole of Eden. They have grown up to be fourteen powerful dragons, and the mightiest of all were the two oldest ones, Aiden and Edna. They were the two best candidates for the throne: holding the Supreme Power stone and becoming the Supreme Guardian of Eden. The next step after the dragon has already in shaped inside the mold and the Edens colors effect has done. Depending on the color, each step will be different from the other, like waiting for the color beams to settle down, not too long or too short, not too small or too large. Every step is being repeated over and over again and abide exactly the palette of each keycap, each color beam is being created exactly the position that we wants, and no need to discuss about the harmonious. It also takes 8 hours to finish, after all the color beams are on their right positions, we will put it inside the pressure pot, this time we’ll have to wait for around 12 hours. . A history of the human brain from the big bang, fifteen billion years ago, to the day before yesterday . . . It's a delight."-- The New York Times

Lodsmok

Writing for the New York Times, John Leonard called the book "a delight" and described Sagan as "a scientific Robert Redford, handsome and articulate and all business." The book was awarded a Pulitzer Prize in 1978. [4] In popular culture [ edit ] Carl Sagan served as the David Duncan Professor of Astronomy and Space Sciences and Director of the Laboratory for Planetary Studies at Cornell University. He played a leading role in the Mariner, Viking, Voyager, and Galileo spacecraft expeditions, for which he received the NASA Medals for Exceptional Scientific Achievement and (twice) for Distinguished Public Service.