Earth will likely have undergone a supervolcanic eruption large enough to erupt 3,200 km3 (770 cubic miles) of magma, an event comparable to the Toba supereruption 75,000 years ago. Highest estimated time until the red supergiant star Betelgeuse explodes in a supernova. The explosion is expected to be easily visible in daylight. It may explode in as little as 100,000 years, depending on the evolutionary model. All glass created to date will have finally degraded. Massive stone structures like Giza or sculptures at Mount Rushmore may still exist. Everything else gone. Desdemona and Cressida, moons of Uranus, will likely have collided.