Numerical simulations of the Earth's surface temperatures at the spring equinox, with an increasingly luminous Sun in the future. The first two diagrams are obtained with the global climate model. The second one shows the situation just before the complete evaporation of the oceans. The last one (380 W/m2) is an extrapolation showing temperatures after the complete evaporation of the oceans. The dates, expressed in Myr (millions of years), indicate the Sun's evolution: in reality, the continents and topography will be totally different in this distant future. © Jérémy Leconte