Time flies when you’re having fun.
Or just when the world is swallowing you whole.

I’m fascinated by the brain[1]; its origin, its work and its deterioration.
More than anything I’m fascinated by its ability[2] to observe itself.
Right now I’m observing a phenomenon related to the plasticity of time in the brain; I’m madly accelerating towards each year’s end.
It’s almost May, soon it will be July and then it will be October – each year accelerates.

July will be October -

It turns out that this sense of acceleration that overwhelms me is very real.

The brain has two distinct time keeping modes: a Circadian rhythm (aka the body clock) and a momentary perception of time passing.
From what I’ve read, these are intertwined and are both controlled by the Suprachiasmatic nucleus. However, they function separately.
The body’s circadian rhythm is relatively fixed[3], but it seems that our perception of time and the real time in which our senses operate is changeable.
The Suprachiasmatic nucleus controls these independently, separating our body’s concept of time, from that of our conscious mind.

Research is showing that a variety of factors influence the functioning of this tiny instrument to the extent where time really, physically, perceptually speeds up.The most common such influence is age[4].
My grandparents have many times mentioned that the days pass really quickly, even though they are retired and spend all of them sitting in different chairs humming to themselves.
Remember how long a school term was in primary school? A week took fucking forever to pass, never mind an entire term!
Your Suprachiasmatic nucleus is accelerating. The world really is moving faster.

Acceleration -

Here’s a fascinating experiment that shows the real plasticity of not only our perception of time, but of the rate of our brains’ internal clocks.

Psychologist Dr David Eagleman, [...] asked volunteer Jesse Kallus to perform a terrifying backwards free-fall of 33 metres.
If the [theory was] correct, Jesse’s perception of time would be slowed by the terrifying experience.[...]
Dr Eagleman came up with a cunning device: the “perceptual chronometer”, a wristwatch-like device which flicked blindingly fast between two LED screens.
Normally the flicker would be so fast Jesse could only see a blur. But if time slowed down for him, he might be able to discern the two different screens and read a random number on one of them.
All Jesse had to do was jump, and read. As he ascended the 33ft metal cage no-one seemed to believe this curious experiment might work.
When Jesse landed, he noted he had seen “98″. [...] In fact the number was 96. Not quite spot-on, but the two numbers look very similar on a digital screen.
Further jumps got similar results – all suggesting that time did seem to slow down for Jesse during the jump.

Whether or not the science of this experiment is sound, we cannot deny the evolutionary imperitive for this in the brain.
When we are not under threat and simply need to operate efficiently under rote conditions (performing a repetitive piece of work, walking far etc.) the brain can safely speed up time, thereby reducing the energy that it consumes in processing events in real time.
But when reaction time is crucial (e.g. in dangerous situations) the brain’s clock speeds up, processing more information, consuming more energy, slowing down time.

Of course, none of this helps me to catch a hold of the days that zoom past the foot of our bed.

[1] Not just the human brain. Sure, it is the most complex we know of, but even the common house fly’s brain is radical. The house fly’s optimised neural wiring gives it a reaction time of one 50th of a second, twelve times faster than a human’s.
[2] At least in humans
[3] Michel Siffre spent 2 months in a cave in 1962 foregoing any means of telling time – his circadian rhythm remained relatively in tact, but his ability to measure the passing of time (guessing what time it was) was totally lost.
[4] There are numerous scholarly articles on this topic – but they don’t make for good reading so I won’t cite any.