Thyroid conditions may make getting pregnant impossible.
Did you know?
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Amino Acids Structures and Diagrams
six of the 20 amino acids
Reversible amino acid modifications involved in regulation of protein activity