"A wormhole can be visualized as a tunnel with two ends, each at separate points in spacetime (i.e., different locations and/or different points of time), or by a transcendental bijection of the spacetime continuum." -Wikipedia
UFO
A metallic or translucent disk with little people, gray skin, large eyes also translucent or ephemeral and moving within a fixed space.
Ask yourself;
"What do people from the future look like?"
"What would someone see if they looked through the other end of your tunnel?"
Think about it;
"In the future our Sun becomes destabilized altering the physics of our local space therefore an Einstein-Rosen Bridge is possible once the star begins to collapse."
Our Sun is dying
We are studying the past... not physically here, craft move erratically because they are not physical.
The other end of the bridge. They are us.
The tunnel moves, jostles as physics, space-time, change. Who watches The Watchers?
Physical beings cannot travel through time, Can they see through it? Can you?
You're traveling through time right now, in your mind, with your imagination.