The annual Conference of the Parties summit is taking place this week and next, and today's non-partisan coverage explains the intentions and challenges of the event. We're also reporting on how a new application is crowdsourcing volunteer paramedics in France. We're exploring a historic shipwreck with the team that found it after just minutes of searching. Plus: an 88-year-old marathoner in Greece and an update on Pesto the prodigious penguin!