-The undertaking of an enthusiastic group of scientists to transform an indoor cycle racing-track built for the 1968 Montréal Olympics into an ecological park. The Biodôme of Montréal (in Canada) contains 4 ecosystems of the 3 Americas, from the Tropical Forrest to the Polar World, from the Laurentian Forrest to the St-Lawrence Marine Environment.—Jean-Marie Berthiaume <jiembe@videotron.ca>