https://www.youtube.com/watch?v=YIJoyh5PY4Q
Neil deGrasse Tyson has realized that Einstein's space-time (allowing Einsteinians to claim that travel to the future is possible) is wrong, and is desperately hinting in that direction (2:22): "I have no access to the past, I have no access to the future." Here is what Einsteinians usually teach:

https://www.youtube.com/watch?v=ljQI7gGIot4
Brian Greene: Is Time Travel Possible?

Pentcho Valev