Endothermy, colloquially known as warm-bloodedness, was a major breakthrough in the history of life on Earth. It gave rise to the active lifestyle of birds and mammals. But how did it evolve? Research into this question has been ongoing for decades, though in the eyes of evolutionary physiologist Barry Gordon Lovegrove, the field has stagnated amidst competing single-cause hypotheses that all try to find that one killer explanation. In his wide-ranging Fires of Life, he brings together many disparate strands of research and gives an overview of our thinking on the evolution of endothermy in mammals and birds. Providing food for thought for students in this field, it also is a great overview for the general reader that stands out for its superbly accessible writing.
I cannot deny that the first thing that came to my mind upon seeing this book was Leslie Nielsen’s slightly smutty beaver joke in Naked Gun. Shame on me, as environmental journalist Ben Goldfarb presents a serious, incisive book that shows just how important beavers and their dams are for biodiversity, ecosystem health, and hydrology. If humans are now said to be a geological force to be reckoned with, birthing the term Anthropocene, our persecution of beavers led to the loss of another geological force.