White holes are theorized as the opposite of black holes, emitting matter and light rather than absorbing them. They remain largely speculative, with no physical or observational evidence to support their existence, despite being a potential mathematical solution within the framework of relativity. The discussion highlights the lack of visibility into black holes, complicating the understanding of what might exist on the other side. Some participants suggest that quasars could be related to white holes, while others argue that this connection lacks proof. The concept of white holes raises questions about fundamental laws of physics, such as the second law of thermodynamics.