The intervening years without rendezvous milestones span half the Jurassic, the whole of the Triassic, the whole of the Permian and the final third of the Carboniferous. As the pilgrimage moves from the Jurassic back into the hotter and drier world of the Triassic—one of the hottest periods in the planet’s history, when all the land masses were joined together, forming Pangaea—we pass the late Triassic mass extinction, when three-quarters of all species went extinct.
