Fun facts, brain consumes about 20-25% of body's total energy despite being only 2% of the body's mass.

I'm very surprised the article and also the corresponding paper on human energy didn't even mentioned the crucial role of mitocondria but ironically related linked article on mitocondria at the bottom of article (perhaps based on the magazine recommendation algorithm) does points to it [1],[2].

[1] Mitochondrion:

https://en.wikipedia.org/wiki/Mitochondrion

[2] ‘Turbocharged’ Mitochondria Power Birds’ Epic Migratory Journeys:

https://www.quantamagazine.org/turbocharged-mitochondria-pow...