Today's Takeaways: Politics and Science Clash, Sausage Racers, and Pilotless Planes

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The racing sausages run around the field during the St. Louis Cardinals and Milwaukee Brewers game at Miller Park on April 8, 2012 in Milwaukee, Wisconsin.
From and

1. Political Science: Where Evidence & Ideology Collide | 2. Kristen Stewart on Growing Up and Growing Strong in Hollywood | 3. Final Arguments Delivered in Tsarnaev Trial | 4. The Pilotless Plane: The Future of Air Travel?