In the category "Science" we currently track items of 70 persons. The most popular ones, by number of traded items, are:

Jane GoodallThomas EdisonJ.T. Thomas
Ed CharlesEdward TellerJames Watson
Jonas SalkBill GatesDenton Cooley
Steve JobsLinus PaulingMichael DeBakey
Simon LakeMartin CooperJack Kilby
Clyde TombaughCharles TownesCarl Sagan
Bill NyeTim Berners-Lee 

You can find all people that we're currently tracking items for in the alphabetical index:
A    B    C    D    E    F    G    H    J    K    L    N    P    S    T    V    W