Our homepage today shows two climbers slacklining between boulders near Bishop, California. Look closely and you’ll see something very similar to tightrope walking: The slackliners anchor a thin strip of webbing between two points and then walk across (very carefully, of course). Bishop is near the Sierra Nevada and is a popular destination for climbers interested in both slacklining and bouldering. What"s bouldering? That"s rock climbing without ropes or harnesses. Instead, climbers simply shimmy up rocky crags and free-standing boulders—but no higher than 20 feet, for safety’s sake. And where there are rock climbers, you’ll likely find slackliners.