Staying Awake Could Combat Depression — The Five Best Ideas of the Day: December 9, 2016

1. Could staying awake combat depression?
   by Louisa J. Steinberg in Scientific American
2. If the U.S. pulls back from NATO, could Germany build a nuclear deterrent?
   by Ulrich Kühn at the Carnegie Endowment for International Peace
3. Want to improve wind and solar power? Bring them together.
   by Ben Jervey in Ensia
4. Women use cities differently from men. Urban design should reflect that.
   by Alexander Starritt at Co.Exist
5. Declining racism might make racists more racist.
   by Daniel Engber in Slate

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