By Jere Mateo Jeremias Mateo Castillo (43, Spain, MSF bio here, @jereswim, aka Jere Mateo) is a 43-year-old Spanish adventurer, mountain climber, and paraswimmer who got into swimming after a terrible mountain climbing accident. His ascent in the sport, culminating in his journey towards the Oceans Seven, is steady and gradual. He has done races ranging from […]