Mike May, who describes himself as “a climbing bum,” gave us a tutorial on slacklining, the sport in which people walk on not-so-tight ropes suspended between trees. The wider 2-inch slacklines are ...

Former highline world-record holder Sarah Rixham makes balancing on a narrow line over 120m in the air look like child’s play. When she’s not balancing above a quarry or mountain gorge, she’s honing ...