Stem cell aging is potentially worrisome because it diminishes the body’s natural ability to repair tissues and organs.

Scientists are trying to figure out if time travel is even theoretically possible. If it is, it looks like it would take a whole lot more knowledge and resources than humans have now to do it.

After working on time travel paradoxes for the last three years, I have become increasingly convinced that time travel could be possible, but only if our universe can allow multiple histories to ...

The concept of time travel — moving through time the way we move through three-dimensional space — may in fact be hardwired into our perception of time.

According to NASA, not only is time travel possible, but we are each taking part in time travel every single day of our lives -- from a certain perspective.

Time travel is the concept of moving between different points in time, just like you move between different places.

It’s not yet clear whether a theory that unites general relativity and quantum mechanics would permit time travel.

The Time Travel in Lost In Space Lost in Space was supposed to be your standard “save the world” mission.

The ability to jump forward and backwards in time has long fascinated science fiction writers and physicists alike. So is it really possible to travel into the past and the future?

Time seems to have an "arrow," whereas the spatial dimensions are ambidextrous. Given the unity between time and space, it leads to the obvious question: Is time travel, of any sort, possible?