Mark McClusky says for elite athletes today, pushing boundaries and breaking records is all about "the aggregation of marginal gains."
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We revisit host Robin Young’s trip with her now-late uncle, Lachlan Maclachlan Field, to see the migrating snow geese at the Dead Creek Refuge in Addison, Vermont. Less than a decade ago, visitors were awed by fields and skies filled with as many as 20,000 geese at a time. But now, because of changing migration patterns, the geese in the area number just a few thousand.