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David Goggins (born February 17, 1975) is an American motivational speaker, author, and retired United States Navy SEAL.He is also an ultramarathon runner, ultra-distance cyclist, triathlete, and was inducted into the International Sports Hall of Fame for his achievements in sports. [5]
Ultra-black is one of the darkest shades of the color black.An ultra-black substance is defined as reflecting less than 0.5% of the light that hits its surface. [1] This color is part of the natural coloration of some species of birds-of-paradise, butterflies, and fishes, and ultra-black components are used in telescopes, cameras, and solar panels to improve the efficiency of light capture.
David Goggins – Only member in the US Armed Forces to complete SEAL training, Ranger School, and Air Force Tactical Air Controller training. [2] Also an ultra-marathon runner, motivational speaker, and world record holder. [specify] William Goines – Founding member of SEAL Team Two in 1962 and retired Master chief petty officer. Vietnam War ...
The name is a portmanteau of the acronym VANTA (vertically aligned nanotube arrays) [5] and black. The original Vantablack coating was grown from a chemical vapour deposition process (CVD) and is claimed to be the "world's darkest material" absorbing up to 99.965% of visible light measured perpendicular to the material.
Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. [1] It is used to add mild corrosion resistance, for appearance, and to minimize light reflection. [ 2 ]
An 8-year-old boy with Down syndrome became a hero after he alerted his 14-year-old sister of a fire in their Colorado home, helping them get out on time before it was engulfed in flames.
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