Partial update

I'm at this crazy huge museum in Paris, called the "Cite des Sciences et Industrie". Saw a 3D movie (unfortunately spoiled by the daycare groups who were there) and a planetarium show (fantastic; I almost want to go to the second show). 

This place is way too big to see in one day; I've still got most of the museum to visit, there's a 50s era submarine parked outside that I have tickets to go see, and I've just discovered that the Louvre is on a direct metro line from here. 

Not sure if I'll be able to make it to the Louvre; I have plans to go on a 1 hour boat trip tonight at 8PM with one of my colleagues (and his girlfriend and sisters) who is in Paris for the TeVPa conference (I love being a physicist, we get to go to all these cool places).