Time Travel in Bhagavata Purana & Tripura Rahasya

Time travel and theory of relativity are still science-fiction subjects for modern science , but in puranas, it has been discussed multiple times.
One such classic example is that of King Kakudmi and his daughter Revati, who travelled to different loka (dimension) and returned to earth in future time.

Kakudmi was a descendant of the Sun Dynasty (Suryavansha).

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King Muchukunda’s time travel and Musi River

Muchukunda (ancestor of Sri Rama), son of King Mandhata, was born in the Ikshvaku dynasty (Suryavansha).
In a battle, demons dominated the deities. So, Indra the King of deities requested King Muchukunda to help them in war.
King Muchukunda agreed to help them and fought against the demons for a long time. Since the deities did not have an able commander, king Muchukunda protected them against the demonic onslaught, until the deities got an able commander like