Soleil-s EPFL Solar Biennale 19.03.2025 Soleil-s EPFL Solar Biennale Exhibition opening and symposium with lecture by Roger Boltshauser Rolex Learning Center, École polytechnique fédérale de Lausanne, Rte Cantonale, 1015 Lausanne, 5 p.m Exhibition opening and symposium with lecture by Roger Boltshauser Rolex Learning Center, École polytechnique fédérale de Lausanne, Rte Cantonale, 1015 Lausanne, 5 p.m