Photo: Nigel Cox

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Day 22: Call an Old Friend
A study conducted in the Spanish village of San Pedro Manrique serves as a reminder of the power of connection: During an annual fire-walking ritual, scientists strapped heart-rate monitors on people about to dash across the coals, their friends and relatives, and visiting spectators. Amazingly, the heart rates of the fire walkers and their friends and relatives started to synchronize, rising and falling at almost the same moments. It goes to show that our relationships manifest in more ways than we know. Don't underestimate the impact that you and your loved ones have on each other. Reach out to someone you haven't talked to in a while and spend an hour or two rebuilding your bond.