Any kind of natural event.

Physical, chemical and bio-physical interactions in the natural order, could be divided into successive (and concurrent) events which span a longer or shorter period of time:

  • physical events, for instance the falling of a stone, the occurrence of an earthquake, the freezing of water;
  • chemical events, such as the burning of a piece of wood, or chemical reactions;
  • biological events such as the birth, growth and dead of a mammal, or the eating of food.

Events included