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Celsius: A Life and Death by Degrees

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This is the first, full-length English language biography of Swedish astronomer and Earth science pioneer Professor Anders Celsius. It reveals what his extraordinary but tragically short life and career can teach us about our today and humanity's tomorrow.

The book tells how Celsius' study, travels and relationships at the peak of the European Enlightenment helped him to unlock fundamental mysteries of the natural world, and how his life offers vital lessons for now and the future. He was a mercurial thinker who ran out of time, but his discoveries, philosophy and personality still point a hopeful way forward.

Best remembered for inventing the Centigrade scale, Celsius' name now frames humanity's future in the international targets to limit average global temperature increases to no more than 1.5 degrees above pre-industrial levels. As our world faces this life-or-death struggle, there's much we can learn from Celsius. If we will listen.

469 pages, Kindle Edition

Published September 26, 2024

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About the author

Ian Hembrow

4 books1 follower

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Displaying 1 - 4 of 4 reviews
33 reviews
July 16, 2025
I received a digital review copy of this book from NetGalley.

Prior to reading this book, I knew Anders Celsius as the man who created the temperature scale most of the world uses. I did not know about all the other scientific work he was involved in. For example, he played a large role in determining the shape of the Earth, established the first serious observatory in Uppsala, studied magnetism, etc. he also influenced numerous other scientists who left their own mark. Surprisingly, this book spends very little time and space on his development of the temperature scale. One of the things that is really remarkable is that Celsius did all this despite dying relatively young (early 40s).

The account of Celsius' life was well-written and interesting. The author did an excellent job in bringing him and his colleagues back to life. The science in the book is broken down so it should be easily understood even if the reader doesn't have prior subject knowledge. There is also a good attempt to show the lasting impact and implications of Celsius' work. This is most successful when the author discusses the immediate aftermath of Celsius' death, and does a rundown of his closest colleagues and assistants. It is less successful when the author pretends to be Celsius and pens a letter that Celsius would have written to future generations. That merely comes off as self-aggrandizing and arrogant; it was a poor way to end the book. It was also not the first time the author intruded on Celsius's story; there are several points throughout the book where the author unnecessarily inserts himself, interrupting the flow of the narrative and detracting from the overall impact.
Profile Image for Mandy.
3,633 reviews334 followers
October 18, 2025
This first full-length biography brings to life Anders Celsius (1701-1744), the Swedish astronomer and physicist, whose name is now largely remembered for the temperature scale named after him, and which thousands use every day without even considering the real man and his work. Certainly I’d never thought about who actually invented the scale, and this easily accessible and readable account of his life makes for some very interesting reading. Although the author does his best, I still found some of the science beyond me, but that’s my problem not the book’s. Occasionally the narrative pace slackened, especially when recounting Celsius’ expeditions, like the one to the Arctic, but overall I found the book engaging, and I enjoyed the way the author inserted himself into the narrative on occasion and brought the past into the present. Celsius may be long dead, but his science and discoveries left a legacy that is still relevant today.
Profile Image for Lisa Konet.
2,360 reviews10 followers
January 5, 2026
This was quite a fascinating read and long overdue to finish this. To state the obvious, we all knew about Anders Celsius and his temperature scale that will always be used even if people today still get confused how to convert from Celsius to Farenheit (and vice versa), it is an important concept to grasp. What was more fascinating was his other scientific contrbutions and his education and he was an explorer/navigator...

Some of the advanced science was a little beyond me, but I still found it fascinating and engaging. The pacing was a little slow in parts but it did not take away from getting to know about the subject better. I felt like I was getting to know a friend and I like when nonfiction is written this way.

Thanks to Netgalley, Ian Hembrow and Independent Publishing Group History Press for an ARC in exchange for an honest review.

already available 5/20/25
10 reviews
December 13, 2025
I enjoyed this book. I was very interested in reading about the expedition to the arctic to measure a degree of latitude. Understanding the physical endurance and privations that the team had to suffer to do this was fascinating. The fact that they did it so accurately is a tribute to all involved in the 18th century expedition.
Displaying 1 - 4 of 4 reviews

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