Space time continuum may be the stuff of Star Trek, but it's not mere fiction to Holly Branigan. The Edinburgh University psychologist can actually "see" time:
"I thought everyone thought like I did, says Holly Branigan, also a scientist at Edinburgh University, and someone with time-space synaesthesia.
"I found out when I attended a talk in the department that Julia was giving. She said that some synaesthetes can see time. And I thought, 'Oh my god, that means I've got synaesthesia'."
So what exactly does she see?
"For me it's a bit like a running track," she says.
"The track is organised around the academic year. The short ends are the summer and Christmas holidays - the summer holiday is slightly longer.
"It's as if I'm in the centre and I'm turning around slowly as the year goes by. If I think ahead to the future, my perspective will shift."
BBC News science reporter Victoria Gill has the story: Link
It's just neural crosstalk... signals from one sensory channel bleeding thru to another. Fun, and occasionally useful [aids in memory consolidation] but ultimately irrelevant.
I have no visualization whatsoever, much less overlapping ones, but am no further ahead or behind than anybody else.
Synaesthesia does sound like fun tho.
Here is something really weird... my numbers have a gender. LOL!