I'm trying to get more information on what it'd be like on planets where most of the atoms in the atmosphere are Argon rather than Nitrogen. Stuff we know: Argon is about 2.85 times heavier than Nitrogen. Argon molecules are single while Nitrogen usually is found in molecular pairs (N2). Argon can be formed by interactions involving radiation Its density causes it to hug the ground more Argon is more narcotic than Nitrogen The question is how would this affect planetary life? I found this thread helpful: http://flare.solareclipse.net/cgi2/ulti ... 002233;p=2 but I'm trying to find better sources of information.