The Koch brothers and boxing champion Heather Hardy

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Three epic battles: Jane Mayer recounts her experience investigating — and being investigated by — Koch Industries; the boxer Heather Hardy forfeits the prize money for a fight before setting foot in the ring, but wins anyway; and Junot Díaz is stripped of his honors by the government of the Dominican Republic. Plus, the astronomer who wrote How I Killed Pluto and Why It Had It Coming lays out his evidence for the existence of a new ninth planet.

Illustration by Rebecca Mock