The peak of reproduction arrives at 37% of the way through life
The clock of life ticks at different speeds for every species, yet the hand marking the peak of reproduction always stops at the same mark: 37% of the way. In beech trees, cod, albatrosses, and humans, the maximum effort to continue the line comes when a little more than a third of the maximum lifespan has been lived. This is not a coincidence but a mathematical law as reliable as gravity.