I very warmly recommend the book "Sex, power, suicide" which explores different theories on how we came to have mitochondria and their impact and role. Dense re

I very warmly recommend the book "Sex, power, suicide" which explores different theories on how we came to have mitochondria and their impact and role. Dense reading but I learned something on every single page. The author more or less concludes (highlighting also limitations of the science and current knowledge) that our cells were arachea which absorbed a methanophile bacterium that became both our today's mitochondria and a parallel process for the chloroplasts in plants (with possibly a common ancestor if I remember well).