You are down to the wire with your kid's science fair project — It needs to get done and it needs to get done quick. That's we've provided a few great science experiments you can do at home ...

and exciting science fair projects from years past. These are 16 of the most impressive teenager-led science projects we could find. And they all began with a simple question and a love of science.

Sandy Smith, President and Publisher of the Philadelphia Business Journal, chats with Todd Lofgren, Senior Vice President, Skanska USA Building, Metro Philadelphia. Lufgren discusses large- and ...