The 9th edition of Polish nationwide Biologists’ Night was held on 10 January 2020 at the Faculty of Natural Sciences in Katowice. The event is addressed to children, youth and region inhabitants interested in natural sciences. Biologists’ Night is a unique opportunity to meet the employees of the Institute of Biology, Biotechnology and Environmental Protection, get to know their laboratories and equipment, as well as find out about the subjects of scientific research conducted at the Institute.