Was the wormhole discovered by Einstein and Rosen formed by a black hole and a white hole?
Wormholes are currently a theoretical construct. No one has ever discovered one yet.
Here's more on wormholes:
The notion of the wormhole being formed by a black hole and a white hole can't be answered.
I know it. But, so, what have Einstein and Rosen theorized?
Separate names with a comma.