Słonimski was born in Warsaw in 1922 and he finished "underground" studies of medicine during World War II in occupied Poland.
He was a member of the Polish resistance movement and the Armia Krajowa, and he fought during the Warsaw Uprising.
According to his own account, he became interested with genetics when he discovered, among ruins of a German police station and while performing an act of sabotage, a German book on the experiments of George Wells Beadle and Boris Ephrussi.

After the war, he finished medical studies at the Jagiellonian University in Kraków.
In 1947, Słonimski emigrated and settled in France, as members of Armia Krajowa were prosecuted by the newly established communist government in Poland.
Once in Paris, he joined the group of Boris Ephrussi and started working in the field of genetics.
In 1952 he obtained his Ph.D.
Between 1971 and 1991, Słonimski was the director of Centre de Génétique Moléculaire of the French CNRS in Gif-sur-Yvette.

Słonimski never broke the contacts with his home country, Poland.
Since 1980, he was heading the Solidarité France-Pologne, organizing aid for Poland.
He frequently hosted Polish intelectualists and dissidents, such as Adam Michnik, Tadeusz Mazowiecki, Maria and Leszek Kołakowski.
When martial law was introduced in Poland in 1981, he organized financial support for scientists repressed by the government.
The money was smuggled and distributed in Poland by two Polish couriers: Wacław Gajewski, a professor of genetics, and Władysław Kunicki-Goldfinger, a professor of microbiology.
Słonimski gave them the code names "Eukaryote" and "Prokaryote", as Gajewski was working on fungi, and Kunicki-Goldfinger was a microbiologist.
Słonimski was born in Warsaw in 1922 and he finished "underground" studies of medicine during World War II in occupied Poland. He was a member of the Polish resistance movement and the Armia Krajowa, and he fought during the Warsaw Uprising. According to his own account, he became interested with genetics when he discovered, among ruins of a German police station and while performing an act of sabotage, a German book on the experiments of George Wells Beadle and Boris Ephrussi.
After the war, he finished medical studies at the Jagiellonian University in Kraków. In 1947, Słonimski emigrated and settled in France, as members of Armia Krajowa were prosecuted by the newly established communist government in Poland. Once in Paris, he joined the group of Boris Ephrussi and started working in the field of genetics. In 1952 he obtained his Ph.D.
Between 1971 and 1991, Słonimski was the director of Centre de Génétique Moléculaire of the French CNRS in Gif-sur-Yvette.
Słonimski never broke the contacts with his home country, Poland. Since 1980, he was heading the Solidarité France-Pologne, organizing aid for Poland. He frequently hosted Polish intelectualists and dissidents, such as Adam Michnik, Tadeusz Mazowiecki, Maria and Leszek Kołakowski. When martial law was introduced in Poland in 1981, he organized financial support for scientists repressed by the government. The money was smuggled and distributed in Poland by two Polish couriers: Wacław Gajewski, a professor of genetics, and Władysław Kunicki-Goldfinger, a professor of microbiology. Słonimski gave them the code names "Eukaryote" and "Prokaryote", as Gajewski was working on fungi, and Kunicki-Goldfinger was a microbiologist.
Piotr Słonimski