Supertiny and Superbig

Is our perception bounded by the scale and lifetime of things we can measure? If the multiverse theory is correct and there is empirical evidence that it is correct, then our universe or any universe is the smallest building block in that collection of universes. According to one theory there are many times more universes than the number of atoms in our observable universe. Now think of us as observers in our universe and the scale and the life time of things we can measure, from galaxy clusters with super massive black holes to fermions and hadrons. We know these exist, because we can measure their scale in some way, either direct or indirect. This is what our universe is composed of or so we think. What lies beyond our power of measurement? Is there a universe which completely lies within the confines of the smallest subatomic particle? A universe with a lifetime so small it destroys itself even before it can be measured? It's more of a question of philosophy in science rather than pure science but then science and philosophy do meet very often. A similar question can be asked on the other end of the size spectrum. Is there a universe so huge and with a lifetime so vast that we can't measure it? Beyond our universe, multiverses where we are relatively small like a fermion? A universe so vast that it has remained practically unchanged in the last 13.8 billion years our universe has been alive? To an observer in that huge universe are we like a tiny universe which would disappear in a millionth of the time it takes to blink his eyelid?

Excuse me! Your shoelaces are undone.

My shoelaces come undone a lot and people get concerned that I would fall down. Strangely I have never fallen down because of my untied shoelaces. So this got me thinking, can shoe laces really cause people to fall down and if so how have I escaped almost every day. I did a 2 minute exercise and had this observation. Since while walking you never lift or put down both of your feet at the same time the only way you can fall is when you step on your undone shoelace. Moreover to fall down you will need to step on the shoelace of your other foot. Now when you plant your foot on the ground your shoelaces naturally tend to get thrown forward because of momentum.  Assuming that the shoelaces are thrown straight up in the direction you are walking and stretch to their maximum length, to make you fall down your other foot will need to land on the shoelaces. This means that your foot should not go beyond the distance that your shoelaces extend to. In other words in order for you to fall down your shoelaces should be bigger than or at least equal to half the size of your footstep. Taking that into account it is impossible for me to fall down since I have long footsteps. People who have smaller footsteps and long shoelaces however still may fall down and small children especially. This is not to say that tall people may never fall down. For example in sports where you run a lot and change direction and size of footsteps suddenly, you are still prone to falling down, because of undone shoelaces. In normal walk or run however there are very less chances of that happening. So next time you buy shoes/ shoelaces make sure they extend less than half the size of your average footstep. ;) Enjoy!