After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Thyroid conditions may make getting pregnant impossible.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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The FDA recognizes 118 routes of administration.
Measures of ocean chlorophyll-a concentrations from part of Atlantic Canada in (a) January 2006, and
The Periodic Table (Part 1)
Map These Genes (Part 5)
Structures of the ionized forms of some representative fatty acids (part 2)
Question 37 Part 2
Annotation of a DNA sequence containing part of the human globin gene