@Ruth_Mottram I had some contact with lab animals in my early years, and as a child I had a pet rat that was rescued from a lab. I remember someone introducing guillotines in their lab as a more humane way to kill – compared to previous methods it was. It's so sad that progress requires so much pain. Perhaps monuments such as this help, but sadness remains. https://boingboing.net/2014/01/17/a-monument-to-laboratory-rats.html