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.
For a person standing at sea level, however, the horizon is only about 3 miles away. Lets do the calculations. The figure below shows an observer whose eyes are a distance E above sea level. A straight line drawn from the observers eyes tangent to the seas surface touches it at the distance d1, which is the distance to the horizon. If R is the radius of the earth, then, to first order in E/R, it is easy to show that.