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Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Did you know?
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
Did you know?
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.