White Hole

"Unless something goes in or out of the horizon,
from the outside a white hole is
indistinguishable from a black hole.
...
The black horizon, like Gandalf,
has magically turned white.
...
Despite the complete difference between
what happens inside them, time’s
sleight of hand on the horizons allows a
white hole and a black hole to be
the same thing outside.
...
A white hole is a black hole with time reversed.
...
...finite are the lives of us all, of
every living organism, every star,
every galaxy, of all stories,
in this universe of joy and pain.
Not even white holes last forever."

- Carlo Rovelli (1956 - )
White Holes: Inside the Horizon