Everyday Things you never knew had a purpose.
These are things we use everyday which has features and functions we don't understand or ignorant of their uses.
1. Tiny hole in airplane window.

The tiny holes are for two reasons. One is to compensate air pressure as when the airplane climbs to high altitude there is huge pressure difference between the inside & the outside of the plane. The second reason is that it prevents the windows from fogging up.
2. Car Headrest.

One other use which majority of us are not aware of. If your car gets submerged in water or in an accident you can detach the headrest and can use the metal part to break the wind screen.
3. The blue side of eraser.

Did you know that the blue part
of an eraser is used to clean writing on the wall or on any hard surface while the red or white one is used to clean writing on paper.
4. Black hole between flash and camera.

The tiny hole is a microphone which record the ambient noise, not your voice, because when we take a picture our positioning is pretty far from the mouth during that time.
5. Hole in pen caps.

Most Biro or pen do not have this future here in Nigeria.
Honestly I never bothered about the hole in the cap or along the side of the plastic case holding the Biro. but my friends used to make their own assumptions that hole is there for air passage to prevent the ink drying up but the real reason behind this is different.
6. Cylinder on the laptop charging cord.

The little cylinder part is actually called ferrite bead, it plays an important role in keeping your laptop running. Every small parts inside a laptop run because of radio frequencies. The cylinder has chunks of magnetic iron oxide which stops the radio frequencies from interfering with each other.
7. Loop on the back of a shirt.

Back in the days when there were no wardrobes, these loops were used to hang a shirt on nails ,hooks or hangers knocked at the back of the door, But nowadays after arrival of wardrobes,
lockers and drawers these loops serve like a decorative design.
8. Holes on your canvas shoes.

The holes on your canvas actually have two specific purpose. The first is to provide a little ventilation to your feet as the holes allow air to circulate around, the second purpose is for lacing, this allows your shoes to be tighter around your feet.
