A great many scientists contributed to the progress that led to the amenities of modern 21st century life. It is sometimes difficult to remember the scientist that made that progress possible. Therefore, we compiled this companion for biological scientists. We chose to what happened on this day format so that readers could look up who made contributions on a specific day. The selection is not complete but covers major scientists and their accomplishments. If this companion is used throughout the year on a daily basis this should allow one to stay on top of scientists and their accomplishments.

He received his MS from the Swiss Institute of Technology Zuerich (1973). He received his Ph.D. from the University Basel (1977) and the venia docendi (1988). He spent his postdoctoral years (1978-1981) at the Boston Children's Hospital, headed the Diabetology laboratory at the ZLF, University Clinics Basel to then join the Harvard Medical School.