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 Irwin
Jim LovellAlan BeanCharlie Duke
Edgar MitchellAlan 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