Bøger af Alfred Russel Wallace

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

This Is A New Release Of The Original 1891 Edition.

Percival Lowell's theories that intelligent life exists or formerly lived on Mars and constructed the canals are subject to a scientific assessment in the book "Is Mars Habitable? " Lowell was an amateur astronomer, but Wallace is a scientist by profession and applies science to Mars with a little more discipline. An article about the likelihood of biological life existing on Mars is titled "Is Mars Habitable." The Welsh town of Llanbadoc is where Alfred Russell Wallace was born on January 8, 1823. With the goal of demonstrating that the abundance of novel and fascinating information in Professor Percival Lowell's book, Mars and its Canals, did not invalidate the conclusion he had reached in 1902 and stated in my book on Man's Place in the Universe that Mars was not habitable, this small volume was originally intended to be a review of that work. However, the more thorough presentation of the opposing viewpoint in the volume under consideration necessitated a more thorough analysis of the different physical issues involved, thus the author decided to take on the task given the topic's high level of popular and scholarly interest.

" ¿is work has been written in consequence of the great interest excited by my article, under the same title, which appeared simultaneously in the Fortnightly Review and the New York Independent. Two friends who read the manuscript were of opinion that a volume, in which the evidence could be given much more fully, would be desirable, and the result of the publication of the article confirmed their view. I was led to a study of the subject when writing four new chapters on Astronomy for a new edition of the Wonderful Century. I then found that almost all writers on general astronomy, from Sir John Herschel to Professor Simon Newcomb and Sir Norman Lockyer, stated, as an indisputable fact, that our sun is situated in the plane of the great ring of the Milky Way, and also very nearly in the centre of that ring. The most recent researches also showed that there was little or no proof of there being any stars or nebulæ very far beyond the Milky Way, which thus seemed to be the limit, in that direction, of the stellar universe...."