Lee Berger in the cave system where Homo naledi was discovered. LUCA SOLA/AFP via Getty Images
Lee Berger and John Hawks (Penguin Random House)
UNTIL now, the most horrific journey of scientific discovery I had read about was by Antarctic explorer Apsley Cherry-Garrard in his 1922 memoir . He describes, in dreadful detail, an expedition to collect Emperor penguin eggs in the dark Antarctic winter. Temperatures plummeted below -56°C (-70°F), his tent blew away and he barely made it back alive.
But to me, a journey undertaken last year…



