(1) was the first and, believe it or not, the paper it was published in was rejected! The technique did take hold though and grew to become very popular. (2) was the first of a body part.

What technique?

The technique goes by multiple names - we’ll be liberal with the points.

(Question will be modded on the 22nd)

Cracked by: rohanquizzer, KK, Sumanth Patlolla, rickde, jowens, Bharath, Rogi, finkle, Vishwas B Sharma, Amarendra Kumar, Manish Achuth, tsmyelin, badideabear, shrik, Ananth, Gurupad and Raghuvansh