I used to do animal experiments and my partner still does them daily. We both had to kill (or as they say in science -sacrifice) the animals ourselves when nece

I used to do animal experiments and my partner still does them daily. We both had to kill (or as they say in science -sacrifice) the animals ourselves when necessary. There is a very large body of research that couldn't and can't be done without animal experiments. Both in fundamental and clinical sciences. However, what I do see is a movement away from usage of macaques towards a higher usage of experiments using flies. Rodents are fundamental in neuroscience and will stay that for a while, as they are both easy to genetically modify and have reasonably sized brain and organs that is comparable to ours. I've seen several people, PhD students, but also top-level scientists, moving away from using animals or mammals for their experiments because of the same realization that the author had. It's important that we realize what we are doing to the animals, but the end of animal experimentation is not yet in sight.