{"id":287347,"date":"2023-11-09T20:19:51","date_gmt":"2023-11-09T19:19:51","guid":{"rendered":"https:\/\/climatescience.press\/?p=287347"},"modified":"2023-11-09T20:19:54","modified_gmt":"2023-11-09T19:19:54","slug":"polar-bear-evolution-pre-christmas-book-sale-discounts-on-all-formats","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=287347","title":{"rendered":"Polar Bear Evolution pre-Christmas book sale: discounts on all formats!"},"content":{"rendered":"\n
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This fascinating story finally brings together everything that scientists have learned about the origin of polar bears, in clear language that non-scientists will understand: not just\u00a0when and where<\/em>\u00a0the species arose, but exactly\u00a0how\u00a0<\/em>it happened and why the bears were able to survive repeated cycles of sea ice change, some of unimaginable magnitude. The book includes a detailed account of the fossil evidence, recent hybridization events between brown bears and polar bears, and summaries of more than a dozen genetic studies that have been done on these bears to determine the most plausible time and place for the origin of polar bears.

For the first time, a biological mechanism explains how this rapid transformation from a brown bear ancestor could have happened. Thyroid hormone, essential for countless coordinated body functions including stress responses, the growth of embryos, and the activation of critical genes, seems to have played a vital role in the vast majority of all speciation events. A testable theory based on thyroid hormone not only explains how polar bears came to be but does the same for domestic dogs, flightless birds like the dodo, and extinct dwarf species like\u00a0Homo floresiensis\u00a0<\/em>aka \u201cThe Hobbit\u201d from Flores Island, Indonesia.

If you\u2019ve ever wondered whether polar bears could have arisen more than once or if hybridization with brown bears really did play a significant part in polar bear evolution, this book is for you. It also explains how polar bear biology and behavior have been fine-tuned by natural selection, adapting the species to the highly dynamic Arctic environment of the late Pleistocene, which included interglacial times when sea ice was scarcer than it is today. This book is more than the complete story of polar bear origins: it\u2019s a big-picture account of how evolution works for most organisms. It\u2019s a fascinating story that deserves to be a staple in your home library.<\/p>\n\n\n\n

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From polarbearscience<\/a><\/p>\n\n\n\n

I have\u00a0reduced prices<\/strong>\u00a0on all formats of my\u00a0Polar Bear Evolution<\/a><\/em>\u00a0book for four weeks starting today (8 November-6 December 2023), in time for holiday gift-giving. The ebook version has the largest price reduction (60% of regular price, to US$17.40) but the other discounts are also substantial. This sale is a time limited offer: don\u2019t miss out! Links below.<\/p>\n\n\n\n

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This is the <\/strong><\/em>book for those who are really interested<\/a> in how grizzly bears could have turned into polar bears and why the story of polar bear evolution<\/a> could not be told without discussing climate change<\/a>.<\/p>\n\n\n\n

One Amazon reviewer said this about Polar Bear Evolution<\/a><\/em>:<\/p>\n\n\n\n

The author of Polar Bear Evolution, Susan Crockford, is a good, credentialed scientist. Her writing is clear; her thinking is also. She has a broad understanding of biology and an informed paleo perspective. Crockford condenses a very large literature on polar bear biology and evolution in this book which will help readers understand the science related to the evolution of an Arctic species. Perhaps the most important aspect of this book is its synthesis of information from the fields of wildlife biology, molecular evolution, paleontology, and climate. Her original ideas and hypotheses on thyroid hormone\u2019s role in evolution are very important and add a credible mechanism of phenotypic change which complements the literature on molecular genetic evolution. Polar Bear Evolution is an important contribution to science and its application in evolutionary biology and wildlife biology<\/em>. Matthew A. Cronin, Ph.D.<\/strong><\/p>\n\n\n\n

Available at the links below (others also available):<\/p>\n\n\n\n

USA<\/strong> https:\/\/www.amazon.com\/dp\/1778038328<\/a><\/p>\n\n\n\n

UK<\/strong> https:\/\/www.amazon.co.uk\/dp\/1778038328<\/a><\/p>\n\n\n\n

Canada<\/strong> https:\/\/www.amazon.ca\/dp\/1778038328<\/a> [shipping delay for hardcover version is 4-5 weeks]<\/p>\n\n\n\n

Australia<\/strong> https:\/\/www.amazon.com.au\/dp\/1778038328<\/a><\/p>\n\n\n\n

Germany<\/strong>\u00a0https:\/\/www.amazon.de\/dp\/1778038328<\/a><\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

This fascinating story finally brings together everything that scientists have learned about the origin of polar bears, in clear language that non-scientists will understand: not just\u00a0when and where\u00a0the species arose, but exactly\u00a0how\u00a0it happened and why the bears were able to survive repeated cycles of sea ice change, some of unimaginable magnitude. The book includes a […]<\/p>\n","protected":false},"author":121246920,"featured_media":287352,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"The book includes a detailed account of the fossil evidence, recent hybridization events between brown bears and polar bears, and summaries of more than a dozen genetic studies that have been done on these bears to determine the most plausible time and pl","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691824465,691820505,691824466],"class_list":{"0":"post-287347","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","8":"tag-book","9":"tag-polar-bear-evolution","10":"tag-susan-crockford","12":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/11\/image-271.png?fit=1000%2C1429&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1cKD","jetpack-related-posts":[{"id":297170,"url":"https:\/\/climatescience.press\/?p=297170","url_meta":{"origin":287347,"position":0},"title":"Susan Crockford: Failed polar bear narrative; also their origin\/evolution | Tom Nelson Pod #187","author":"uwe.roland.gross","date":"19\/01\/2024","format":false,"excerpt":"Scientist Susan Crockford has spent decades writing professional papers and books but has been blogging about polar bears for non-scientists since 2012.","rel":"","context":"In \"Climate change\"","block_context":{"text":"Climate change","link":"https:\/\/climatescience.press\/?tag=climate-change"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/01\/0Screenshot-2024-01-19-152844.png?fit=1200%2C667&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/01\/0Screenshot-2024-01-19-152844.png?fit=1200%2C667&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/01\/0Screenshot-2024-01-19-152844.png?fit=1200%2C667&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/01\/0Screenshot-2024-01-19-152844.png?fit=1200%2C667&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/01\/0Screenshot-2024-01-19-152844.png?fit=1200%2C667&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":261713,"url":"https:\/\/climatescience.press\/?p=261713","url_meta":{"origin":287347,"position":1},"title":"How grizzlies evolved into polar bears: The first book to tell the whole story is now available","author":"uwe.roland.gross","date":"12\/06\/2023","format":false,"excerpt":"Polar Bear Evolution: A Model for How New Species Arise\u00a0is the fascinating story of the origin of polar bears. 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It explains polar bear evolution based on a\u00a0genetic interpretation\u00a0that ignores the fossil record, bear behaviour, and geological history.","rel":"","context":"In \"brown bears\"","block_context":{"text":"brown bears","link":"https:\/\/climatescience.press\/?tag=brown-bears"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-polar-bear-feeding.jpeg?fit=1200%2C771&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-polar-bear-feeding.jpeg?fit=1200%2C771&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-polar-bear-feeding.jpeg?fit=1200%2C771&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-polar-bear-feeding.jpeg?fit=1200%2C771&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-polar-bear-feeding.jpeg?fit=1200%2C771&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":367834,"url":"https:\/\/climatescience.press\/?p=367834","url_meta":{"origin":287347,"position":3},"title":"No News is Good News on Polar Bear Day: Celebrate With 35% Off Polar Bear\u00a0Evolution","author":"uwe.roland.gross","date":"27\/02\/2025","format":false,"excerpt":"Instead of asking whether polar bears will survive a bit of warming over the next few decades, ask yourself how they survived more than 100,000 years of unimaginable changes in Arctic climate (both much warmer\u00a0and\u00a0colder) before now?","rel":"","context":"In \"Arctic Climate\"","block_context":{"text":"Arctic Climate","link":"https:\/\/climatescience.press\/?tag=arctic-climate"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/02\/0Polar-Bear-Evolution-and-Relatives-4.jpg?fit=1200%2C803&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/02\/0Polar-Bear-Evolution-and-Relatives-4.jpg?fit=1200%2C803&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/02\/0Polar-Bear-Evolution-and-Relatives-4.jpg?fit=1200%2C803&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/02\/0Polar-Bear-Evolution-and-Relatives-4.jpg?fit=1200%2C803&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/02\/0Polar-Bear-Evolution-and-Relatives-4.jpg?fit=1200%2C803&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":259747,"url":"https:\/\/climatescience.press\/?p=259747","url_meta":{"origin":287347,"position":4},"title":"The story of polar bear evolution could not be told without discussing climate change","author":"uwe.roland.gross","date":"30\/05\/2023","format":false,"excerpt":"Polar bears arose as a new species because the climate changed and forced some brown bears to colonize the sea ice. 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