Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
A fixed action pattern elicited by a sign stimulus.
Mass Loss by a Supermassive Star
The major language areas of the left hemisphere of the brain.
Water Loss Through Evaporation
How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree?