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Author Question: An electron initially in the n = 2 orbital of a hydrogen atom absorbs a photon with a wavelength of ... (Read 70 times) |
Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.
According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.