of -- insects and their plinia at the bank and you know this kind of fed into a broader interest the interest in cross fertilization and cross pollination and over arching interest darwin is convinced that all organisms must cross fertilize very poarnts and i won't get into why he thought that. this is interesting but i koangt get into that. what i will mention is his dedication to documenting it and different cases especially with plants right. so for example, here's a little phage taken from one of the notebooks, where he's mapped out the structure of a flower and showing what he call thes the gangway. way many which the bee enters the flower. up curved -- you know you can see that through good effort in a very commonly, you know, planted favorite. they have that classic up turn pattern to the gangway that bees go into. he's intrelsed too interests into like trigger sensitive pollination like you see request bar per berry and mountain laurel where they are reflexed back and a bee will displace them and they go bing and they shower the insect with flower. he just loved that. he thou