These are the ent

ities that humanity will keep their kindness for life

Two Canadian medical scientists named Sir Frederick Banting and another named Charles Best. It was July 28, 1922, when the two scientists arrived at the pediatric diabetes ward of Toronto's John McLeod Hospital with their newly invented pancreatic hormone insulin. Most of these hospitalized children were comatose and near death from diabetic ketoacidosis and "these moments are known as the most incredible moments in the medical world". Imagine parents sitting by their children in a crowded room, waiting for their inevitable death. 

These scientists went to each bed in turn and injected all the children with the new insulin. As they were injecting the last comatose child, the first injected child started to wake up. Then one by one all the children woke up from their diabetic coma. That room full of death and sadness suddenly became a place of joy and hope. 

History is grateful to those who gave something new to the world in the form of knowledge, in the form of medicine or in the form of invention.