Bacteria from a dirty egg grows inside, turning the contents into a foul liquid, killing any embryo present. Gasses build up and generate pressure that may cause the egg to ooze or explode. I rescued this egg from one of my fairweather broody hens, who had abandoned her nest after two weeks of sitting. The egg was no longer warm when I found it, which didnât give me much hope for the embryoâs viability, but I placed it in my incubator hoping for the best a few days ago.
Another way to ask the same question is: Is the earth a perfect sphere? The answer is that its not, because the earth spins it bulges at the equator and hence the sea is not at the same level all over the world. It depends on what your margin for error is really.
Above sea level, however, the atmosphere thins. Water is much denser than the atmosphere, and thus weighs more and will exert more pressure on anything submerged in it. As depth increases, the amount of water pushing on water increases, so at lower depths the water is actually denser and weighs more. This means that pressure increases with depth. At sea level, Earth's atmosphere pushes down with about 14 pounds of pressure per every square inch. This is because the gasses in the atmosphere have weight. Above sea level, however, the atmosphere thins.