If you are in the Washington, D.C. and only have 48 hours to kill, I have bad news - the USA Science&Engineering Festival has likely packed an entire month of good stuff into this weekend, so you will need Solomon-like wisdom to choose what you want to see.

Larry Bock, head visionary of the event, is a master of logistics, planning and science enthusiasm and we've gushed over his achievements before - but just being able to get an event on the National Mall is more work than most of us would do and adding 1500 activities and 75 stage shows is downright amazing.

They've got Bill Nye the Science Guy, MythBuster's Kari Byron and even people like the the World's Fastest Jump Roper - you might even get to see NIH Director, Leader of the Human Genome Project and recipient of the Presidential Medal of Freedom Dr. Francis Collins play guitar. 

Go here for all the events.  They even got some science love from President Obama: