Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Did you know?
Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.
Did you know?
According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
Measurements of solar cycle variation during the last 30 years
The Last 10,000 Years of Greenhouse Gas Concentrations
Industrial Regions
chemistry lab - acid base titration
economic question
Complementary base pairing of codons and anticodons