"There's no time like the present."
The present is not time.

"Now is the time to act."
It'll never happen.

"Give it to me now."
You didn't want it anyways.

"Ohhh, I'm HUNGRY!"
"It's in the microwave. It'll be done in three seconds!"
"But I want it NOW!"
Ok, that was paraphrased 'cause I haven't seen that episode in forever.

"Now" is a funny thing. It doesn't exist. By the time you have said "Now," now has passed. There is a certain fraction of time in which your brain will 1)process the thought, 2)send an electrical impulse to your face, 3)have a muscle response in your mouth and neck and lungs, 4)have the sound waves traverse the distance to the recieving ear, 5)do all the rest of the shit back through another thought analysis resulting in understanding.

Now fails to work on a huge scale too. Lets say the moon blew up right now. In a few seconds or minutes we would say, "Aaa! The fucking MOON just blew up!" Just when? Just now. To us. Seconds or minutes ago to the moon. And if there had been a passing observer in a spaceship or something... a totally different now.

So there is no universal Now.

But you knew all this already.

This leads to some evidence as to the properties of time itself. There is a theory going around about how we live in a block-time universe. It's kinda like a book. As you read through the book, you have memories of what happened before you, right? And you don't know what will happen next, but you know there is a future and an ending to the book, but you don't know anything about it. And you have your ever-present non-existant Now which you guide along across the pages (through time). But it's all there. Time is a stationary thing. The passage of time is not time going by us but an effect felt by our moving through time itself. So, technically, we could time travel easilly. Just flip a few pages ahead or behind. Although I admit it's a bit harder than that, it is also possibly as simple as that.

It would be easier to do something yesterday than right now.

Ok, not really FUN FACTS, persay... FUN THEORIES AND WANDERING THOUGHTS more like.