From a pigeon-training Mike Tyson to Sarah Palin's Alaskan travelogue, and from the return of Kate Gosselin to TLC to a new show hosted by Oprah Winfrey via the Oprah Winfrey Network, Discovery Communications' 2010-2011 upfront slates promise a wide range of non-fiction programming across its networks. Here's an overview of each net's upcoming slate.

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