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2. International Prototype of the Kilogram - Wikipedia

   en.wikipedia.org/wiki/International_prototype_of...

   The Metre Convention was signed on 20 May 1875 and further formalised the metric system (a predecessor to the SI), quickly leading to the production of the IPK.The IPK is one of three cylinders made in London in 1879 by Johnson Matthey, which continued to manufacture nearly all of the national prototypes as needed until the new definition of the kilogram came into effect in 2019.

3. Orders of magnitude (mass) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

   An overview of ranges of mass. To help compare different orders of magnitude, the following lists describe various mass levels between 10 −67 kg and 10 52 kg. The least massive thing listed here is a graviton, and the most massive thing is the observable universe.

4. SI derived unit - Wikipedia

   en.wikipedia.org/wiki/SI_derived_unit

   The SI has special names for 22 of these coherent derived units (for example, hertz, the SI unit of measurement of frequency), but the rest merely reflect their derivation: for example, the square metre (m 2), the SI derived unit of area; and the kilogram per cubic metre (kg/m 3 or kg⋅m −3), the SI derived unit of density.

5. Doctors Say This Viral "Sleep Rule" Actually Works - AOL

   www.aol.com/lifestyle/doctors-viral-sleep-rule...

   How to follow the 10-3-2-1-0 sleep rule 10 hours before bed: No more caffeine. While there’s some variation in the genetics of how different people process caffeine, 10 hours is a reasonable gap ...

6. Unidentified male DNA found on JonBenét’s clothes - AOL

   www.aol.com/evidence-found-scene-jonben-t...

   The key to solving JonBenét Ramsey's murder could lie in evidence found at the scene nearly 30 years ago.. When police searched the 6-year-old’s home in Boulder, Colo., on Dec. 26, 1996, they ...

7. Former Notre Dame and Akron coach Gerry Faust dies at 89 - AOL

   www.aol.com/sports/former-notre-dame-akron-coach...

   The game was Notre Dame's season opener as the Irish won 23-17 on the way to a 6-4-1 season. Faust announced his resignation near the end of the 1985 season, a year that concluded with a blowout ...