The Isaac Asimov Memorial Debate is held by the Hayden Planetarium (at American Museum of Natural History) each spring. While waiting for the 2016 debate you can watch last year’s debate. It was about water, a quite essential thing for all living creatures. On Earth as on Mars, if we’re going there, we need water. Last year the Maven spacecraft confirmed that Mars has lost a lot of its water. The water issue needs to be sorted before we go.