Zoology: Here be dragons
Emerging evidence indicates that dragons can no longer be dismissed as creatures of legend and fantasy, and that anthropogenic effects on the world's climate may inadvertently be paving the way for the resurgence of these beasts.
The calm was shaken briefly from 1586 to 1597 with The First Stir. Dragons behave no differently from other ectotherms in their brumation protocols, and they will periodically awaken from their slumber and check to see whether outside conditions justify ending the torpor. With their need to maintain extremely high temperatures in their buccal and nasal furnaces, it is crucially important for the fire-breathing species to ensure that the environmental conditions are energetically favourable before breaking their dormancy: there must be warmth and food. Fortunately, The First Stir coincided with the depths of the Little Ice Age and a bewildering lack of knights. Thus, the decision to return to slumber was made without hesitation.