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When considering human-powered equipment, a healthy human can produce about 1.2 hp briefly (see orders of magnitude) and sustain about 0.1 hp indefinitely; trained athletes can manage up to about 2.5 hp briefly and 0.3 hp for a period of several hours.

Spam is a canned precooked meat product made by the Hormel Foods Corporation, first introduced in 1937. The labeled ingredients in the classic variety of Spam are chopped pork shoulder meat, with ham meat added, salt, water, modified potato starch as a binder, sugar, and sodium nitrite as a preservative.

Randy Gardner is the holder of the scientifically documented record for the longest period a human has intentionally gone without sleep not using stimulants of any kind. In 1964, Gardner, a 17-year-old high school student in San Diego, California, stayed awake for 264.4 hours (11 days 24 minutes).

Corundum is best known for its gem varieties, Ruby and Sapphire. Ruby and Sapphire are scientifically the same mineral but just different colors. Ruby is the red variety, and Sapphire is the variety that encompasses all other colors, although the most popular and valued color of Sapphire is blue.

Grey or gray (see spelling differences) is an intermediate color between black and white. It is a neutral or achromatic color, meaning literally that it is a color "without color." It is the color of a cloud-covered sky, of ash and of lead.

20/20 vision is your visual acuity, or the sharpness of vision at 20 feet from an object. Having 20/60 vision means that you must be at 20 feet to see what a person with normal vision can see at 60 feet.

https://www.youtube.com/watch?v=dCu_xhV-LHs&list=PLzgspP2kAXHfOwge5LFeHoRRXiPmpZRZR&index=4

https://www.youtube.com/watch?v=FOuHJudD8tI&list=PLzgspP2kAXHfOwge5LFeHoRRXiPmpZRZR&index=5

https://www.youtube.com/watch?v=v_orPWQTGHE&list=PLzgspP2kAXHfOwge5LFeHoRRXiPmpZRZR&index=9

https://www.youtube.com/watch?v=4Xva0MNL1OA&list=PLzgspP2kAXHfOwge5LFeHoRRXiPmpZRZR&index=8