Starfield:Zoology

It allows you to gain more and increasingly rare resources from fauna, be able to harvest from them without killing them, provides more information about them when you scan them, and learn about them with fewer scans of unique members of the species in total. Reduces the number of scans requred by 1 for each rank. Zoology is unlocked by spending a total of 4 skill points in the Science skill tree.

Skill Increases
After spending the four points you need to gain access to this skill tier, progressing through the rank challenges is fairly straightforward. Just explore planets with a large amount of Fauna, and begin harvesting.