Firaxis has revealed today the next exploration era civ in Civilzation 7: The Abbassids. As an arab caliphate from the Golden Era of Islam, they are scientific and cultural, and get the House of Wisdom as their associated wonder. They get a starting bias for camels and coastal tiles. They get three unique buildings, the Ulema, Madrasa and Mosque, which will give them happiness and science boni. For all the other details, as well as the discussion, please check this thread.