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.
Over the past 5000 years the average rate of sea level rise was much less than 1 meter per millennium (1 mm/year), as shown by geologic markers on coastlines. In the past century tide gauges at coastal cities reveal a larger rate of sea level rise. The second chart below shows that sea level rose about 2 mm/year during 1920-2000. Satellites began to measure sea level precisely in 1993. Since then sea level has been rising about 3.2 mm/year. This rate is equal to just over one foot per century. The impact of such sea level change is substantial, yet the concern is that far greater sea level rise will occur this century if the major ice sheets disintegrate.