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2. Canvas - Wikipedia

   en.wikipedia.org/wiki/Canvas

   Early canvas was made of linen, a sturdy brownish fabric of considerable strength. Linen is particularly suitable for the use of oil paint. In the early 20th century, cotton canvas, often referred to as "cotton duck", came into use. Linen is composed of higher quality material, and remains popular with many professional artists, especially ...

3. Timeline of historic inventions - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_historic...

   Genetic evidence from body lice suggests a range of dates centering over 100 thousand years ago. [28] The first bone scrapers appropriate for scraping hides to make supple leather were found in Morocco dating to 90–120,000 years ago. [29] [30] 164 kya – 47 kya: Heat treating of stone blades in South Africa. [31]

4. List of inventors - Wikipedia

   en.wikipedia.org/wiki/List_of_inventors

   Eunice Newton Foote (1819–1888), U.S. – greenhouse effect, boot soles; Enrico Forlanini (1848–1930), Italy – Steam helicopter, hydrofoil, Forlanini airships; Eric Fossum (born 1957), U.S. – intra-pixel charge transfer in CMOS image sensors; Josephine G. Fountain (fl 1960), U.S. – direct suction tracheotomy tube

5. List of Dragons' Den (British TV programme) offers Series 11 ...

   en.wikipedia.org/wiki/List_of_Dragons'_Den_...

   A specialist organic hemp producer that creates a wide range of Hemp skincare, wellbeing and food supplements Jenny Campbell Signed [note 12] Active [157] [158] Episode 12 4 February 2018 James Dawson T Plus (Now TEA+) 75,000 50 Nutrient rich teas herbal, fruit and green teas with daily essential vitamins Tej Lalvani Signed Active [159] [160]