The Black Death
The Black Death was a devastating plague that swept through Europe, Asia, and North Africa in the mid 1300s, killing tens of millions of people. One…
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The Human Brain
The human brain is the command centre of the body and the most complex object known in the universe. Weighing only about 1.4 kilograms, it contains…
The Human Heart
The human heart is a muscular pump, roughly the size of a clenched fist, that drives blood through the body every moment of life. Beating around…
Vaccines
A vaccine is a preparation that trains the immune system to recognize and fight a specific disease before the body is ever exposed to the real…