Dichronauts Universe

The Dichronauts universe is the setting of Greg Egan's 2017 novel ''Dichronauts. ''

The story of Dichronauts takes place in a universe in which there are two space-like and two time-like dimensions, as opposed to our own universe, in which there are three space-like and one time-like dimension. For further contrast, the universe of the Orthogonal trilogy takes place in a universe in which all four dimensions are fundamentally undifferentiated.