In the category "Science" we currently track items of 15 persons. The most popular ones, by number of traded items, are:

Buzz AldrinNeil ArmstrongPatrick Moore
Felix BaumgartnerJohn GlennHelen Sharman
Al WordenValentina TereshkovaJim Lovell
Jim IrwinEdgar MitchellAlan Bean
Charlie DukeAlan ShepardScott Carpenter

You can find all people that we're currently tracking items for in the alphabetical index:
A    B    C    D    G    I    L    M    S    T    W