Are wormholes real or not?

Could you please clarify for me the existence of wormholes? Is this a concept solely reserved for theoretical physics, or do we have any empirical evidence to suggest they might actually exist in our universe? Have physicists detected any signatures that might indicate the presence of wormholes? If not, what are the current theories and hypotheses surrounding this intriguing possibility? Are there any ongoing experiments or observations designed to search for wormholes? And finally, how does the understanding of wormholes contribute to our broader knowledge of cosmology and the nature of the universe?