Less fear would normally be associated with greater casual risk taking. Given his incredibly rigorous training and laborious and meticulous preparation (years!

Less fear would normally be associated with greater casual risk taking. Given his incredibly rigorous training and laborious and meticulous preparation (years!) for the ascent beforehand, what looks like risk to us is probably as much experience to him. The connections to his amygdala don't seem to have had impact on rational thinking.