The Chill

Most of Tessera's solar insolation (i.e., warmth) comes from the Sovereign. However, during every fourth week (days 22-28) the Tinker is partly or completely eclipsed by the Sovereign, resulting in significantly shorter days and colder temperatures--20 or more degrees Farenheit in some biomes. This effect is called the Chill and it has significant effects on many aspects of the flora, fauna, and civilizations of Tessera. For example, many animals and plants have more natural insulation (e.g., more or thicker fur, heat-absorbing chitin, heat-retaining sap).