For Halloween 2026, the CNRS opens the doors of Button Castle in Gif-sur-Yvette on Friday, October 30, from 7 p.m. to 11 p.m. This second “Terrifyingly Scientific Evening” brings together three roundtables on the afterlife, mummies, and dark matter, plus an escape room focused on bats. The event is only available by registration, starting September 21, 2026.
