1.) Twenty-one hybrid electric buses bring free public transit to Baltimore.
2.) Liquid diamond oceans are possible on Neptune and Uranus, scientists say.
3.) Genetically-modified Monsantos corn has been linked to organ failure.
4.) Will Americans come around on roundabouts?
5.) Urban planners around the world are saving dying cities with strategic reforestation.
This post was originally published on Smartplanet.com