Paris is well equipped in public transports. With one single metro ticket you can go anywhere within Paris city limits. That goes for Metro and RER. According to the length of your stay you better buy a pass called "Navigo" valid for a week or a month which gives you access to different concentrical sections from.
How to get there
Charles de Gaulle, George V, Franklin Roosevelt, Champs Elysees Clemenceau
RER A :
Charles de Gaulle Etoile
from the 2013-12-03 until the 2014-06-08
RadioactivityFrom Homer to Oppenheimer
The Palais de la Découverte focuses on radioactivity by delving back into the latter’s history, from its discovery to the present day. In courses ranging from science to actual use , Through the history of the phenomenon and hazards, radioactivity discovered a simple and objective. The exhibition evokes both the most dramatic episodes of radioactivity that in any other kind of cartoon characters that reference .
Palais de la Découverte