What is a White Hole in physics?

A zone wherein which matter is spontaneously created. As the name suggests, a white hole is different than a black hole. A white hole can be escaped from, but one could never go back. With a black hole, one can never escape. Due to their elusive nature, many scientists view white holes as mathematical oddities.

Dmitriyevich Novikov, a Russian physicist came up with the concept in 1964. Though they can exist, they are very unstable. Therefore, once formed, a white hole could only last for a few seconds. Scientists believe the last one that has a record of forming was in 2006.