re: #70 Love-Child of Cassandra and Sisyphus

Many people have tried to find time-travel embedded somewhere in Einstein’s field equations for General Relativity.

Some have claimed to figure out such… but the requirements for building any device have impossible costs, such as needing the mass of a neutron star.

well, the key from this guy’s equation is that you can never go back further in time than when the creation of the time travel machine occurred. So we will never be able to even travel back to now.