Time traveling forward is not impossible, in fact it is a law of nature. All you have to do is travel faster relative to something else. This is all covered in Einstein's Special Relativity.
But, as you mentioned, Wormholes might be the answer.
If we could warp space-time enough, we could form a bridge between any 2 points in Space and time. Then we could go back and forth.
Unfortunatly true. I love the idea of time travel, being a big fan of back to the future movies when i was a kid. Facinated ever since. But unfortunatly rules of space time dont allow it
and as said worm holes could possibly be an answer to space travel/exploring, some ppl think black holes can shot u out the other side of the galaxy, some ideas are actually quite radical.
On the other hand, theres still alot of physics that we dont understand yet. It was said long ago that breaking the sound barrier was impossible! Ive always wondered, when breaking the sound barrier u get the sonic boom, wonder what happens when u break the speed of light? apart from real time slowing down. All just theories i guess, but einstein has never been wrong (that i know of), he was probaly an alien lol