Invisible Polar Bears and Other Arctic Adaptations

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References:

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[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6801758/
[3] https://pubmed.ncbi.nlm.nih.gov/2912224/ (https://sci-hub.se/10.1152/ajpregu.1989.256.1.R42)
[4] https://jeb.biologists.org/content/221/Suppl_1/jeb162586#:~:text=Brown%20adipose%20tissue%20(BAT)%20is,times%20throughout%20the%20hibernation%20season.
[5] https://www.une.edu.au/__data/assets/pdf_file/0015/32505/Lovegrove20et20al.20SminthopsisPassive20Rewarm20JCP99.pdf
[6] https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/blubber
[7] https://ecobubamarica.files.wordpress.com/2010/10/12.jpg
[8] https://doi.org/10.1115/IMECE2002-32473
[9] https://beyondpenguins.ehe.osu.edu/issue/arctic-and-anarctic-birds/how-do-birds-stay-warm#Complex
[10] Moalem, Sharon, and Jonathan Prince. Survival of the Sickest: The Surprising Connections Between Disease and Longevity (P.S.). Reprint, Harper Perennial, 2008.