- Hippopotamuses have skin 3.8cm (1.5in) thick.
- VHS stands for Video Home System.
- In 1642 French mathematician Blaise Pascal invented the mechanical calculator..
- Camels are born without humps.
- The Hindu-Arabic numeral system began developing as early as the 1st century with a full system being established around the 9th century, forming the basis of the numerical digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 that we use today..
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