theory of relativity

The mystery of the origin of the universe: Can each black hole give birth to a baby universe and do we live in a black hole?
Is our universe a black hole? This is a difficult question to answer accurately, however many astronomical phenomena show that this statement is not impossible.
The age of the universe is about 13.8 billion years but why can we observe 93 billion light years?
Is there something wrong with the big bang theory, or is the theory of relativity itself wrong?
Einstein's watch was sold for a record price
Einstein's friends said, until the last days of life, the author of the Theory of Relativity never left Switzerland's Longines brand watch.