Geodesy is the science that is concerned with determining the size and shape of the Earth and with mapping large areas of its surface. The principal methods used in geodesy include surveying by instruments, making astronomical observations, measuring the force of gravity at various points, and calculating the paths of artificial satellites.
A depressant is a drug that reduces the activity of various body functions. Some depressants such as anesthetics, sedatives, antiepileptics, narcotics analgesics, and some muscle relaxants, slow nervous and muscular activity by acting on the central nervous system. Tranquilizers are depressants that affect only part of the nervous system. They induce relaxation without causing total depression.
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THE ONE DOLLAR BILL
The United States one-dollar bill is the most common denomination of US currency, totaling 45% of all bills ($1, $2, $5, $10, $20, $50 and $100) produced. There are about 2 billion $1 bills in circulation.
SUGAR IN THE MIDDLE AGES
In the Middle Ages, sugar was a treasured luxury costing 9 times as much as milk. Ironically, now that sugar is plentiful, sugar-free products are more popular than ever before.
Facts about birthstones
Did you know? The current assignation of stones to months was established in 1912