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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Did you know?
Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.