I just realised that all answers go to the laboratory scale scientists, i.e. those in white aprons etc.
If you need adventurous scientists you may check Copplestone (Their paleontologist based on Roy Chapman Andrews is superb) and Pulp figures [Their "rugged archaeologist" & "safari in danger" packs are ideal for this purpose], west wind miniatures and blue moon manufacturing have some suitable figures, too [from Dr Frankenstein to the evil german archaeologist]
So, more decisions?