- Coffee is generally roasted between 204 - 218C (400 - 425F) (the longer the beans are roasted the darker the roast).
- 1 gigayear = 1,000,000,000,000 years.
- The numerical digits we use today such as 1, 2 and 3 are based on the Hindu-Arabic numeral system developed over 1000 years ago..
- A Sphygmomanometer measures blood pressure.
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