our host jonathan mann 8:30 in london.e guides you through the wildest and most expensive exercise in democracy. it's time to talk weather and the snow that might impact these iowa caucuses. they don't want to hear that. >> i wondered how the caucuses played out. that was a perfect way he explained it. clarity finally. i will give you clarity on the weather that could impact the caucuses monday night. it appears that the snowstorm we have been talking about for the midwest is going to hold off just a few hours after everything crescendos on monday evening in iowa state. let me give you a run down. look at this graphic and we are talking tuesday. we are going a few days out, but all eyes at least in the united states are focusing on iowa for monday and into monday evening. it's really tuesday when things start to get very interesting for the states in the upper midwest. we are drawing in a lot of cold air from the north. behind our low pressure and ahead of the low, we will see above average temperatures. places like atlant

that is cnn's jonathan mann reports is taking the world by storm. >> everybody is listening.? >> i'm innocent. >> reporter: "making a murderer "eye, the latest binge watching obsession on netflix. it follows the case of steven avery, a wisconsin man who spent 18 years in prison for rape before dna evidence won his release in 2003. just two years later, after filing a multimillion-dollar laurt after a wrongful conviction, avery and his nephew were arrested, both convicted, this time for the murder of a young woman, theresa hallbach. >> reporter: they say evidence was framed. since it premiered, it's attracted a huge following including many celebrities who are heaping praise on the series. actor ricky gervais tweeting, never mind an emmy or oscar "making a murderer" deserves a nobel prize. not everyone is a fan. former district attorney ken kratz was a special prosecutor in the avery case. he tells cnn affiliate wluk the documentary was biased in favor of the defense. >> the jury was provided a much different picture than what this series provides. >> reporter: filmmakers spen

earlier my colleague jonathan mann spoke to planetary evangelist emily lackdawala who seth even though the prospect of mankind on mars seems exciting we should use caution. >> there's a number of different reasons to explore mars. one of the reasons we're excited about mars is that there's the potential that there was life there once and there could even be life there now. it will make it much harder to search for life on mars once humans have put their feet on there. >> fair enough. he's making another point which is that mars could be our fallback planet. does that make sense to you? >> i think it does make sense in the very long term. he's thinking very long -term there. he's taking the necessary steps toward helping us become a multi-planet species by diversifying the different ways we can get off earth with his falcon 9 rocket and other ways of exploring the solar system. he is really thinking very, very long-term. we have a lot of steps we have to get through before then. space stations, long duration human spaceflight, landing heavy thins on mars. there's a lot more to do but he