China and India learned how to infect themselves with smallpox so that they would not get it. It is important because people learned how to not die from a disease.
The Chinese used powdered Chrysanthemums because the Pyrethrins in them are potent. This is important because insecticides could help food production and are widely used today.
Lazzaro Spallanzani artificially inseminated dogs. This is important because it increased information about the animal reproductive system and started artificial insemination.
Louis Pasteur tested his vaccine on several boys and it worked. He claims it worked on dogs too. This is important because it saved many lives.
Discovery of Cancer causing virus
Peyton Rous discovered that parasitic organisms could induce cancer by experimenting of chickens. This is important because cancer is becoming a worldwide issue and his efforts to discover possible causes helped increase the information about it and how to stop it.
Human Growth Hormone
Evans and Long isolated the human growth hormone which comes from the pituitary gland. This is important because eventually this hormone is used to give abnormally shorter children more growth.
Three dimensional DNA
Watson and Crick found that DNA's structure by using the known molecular distances to construct cardboard models. This is important because everyone had DNA inside of them and it is used for all kinds of things, so the shape of it had to be known.
Jacob and Monod discovered that RNA had several different types that had different function and one of them was RNA, so that is how information was transferred.
First gene Therapy treatment
Anderson and Blease conducted gene therapy on a four year old girl which was successful but still came with a number of side effects. This is important because gene therapy i being used to help people to this day although it has not been perfected.
Adult sheep cloning
Scientists cloned a sheep and had a surrogate mother give birth to it. This is important because it furthered the research on cloning and also it's die effects.