Laurasia is the ancient home, and Darwinian proving-ground, of the huge influx of pilgrims we shall meet at Rendezvous 12, the laurasiatheres. At Rendezvous 13 we shall be joined by two strange bands of pilgrims, the xenarthrans, who served their evolutionary apprenticeship on the then island continent of South America, and the afrotheres, another hugely varied group of mammals, whose diversity was honed on the island continent of Africa.
