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avatar Sophia Rich
life hacks Having trouble falling asleep? Try the 4-7-8 technique: 4 second inhale, 7 second hold, 8 second release, and repeat. It really works!

life hacks Having trouble falling asleep? Try the 4-7-8 technique: 4 second inhale, 7 second hold, 8 second release, and repeat. It really works!

avatar Gaie Houston

This is an ancient tool called the silver point, which was Leonardo da Vinci's favorite method of drawing. And since it was invented way before the pencil, it didn't work on normal paper, so a mixture of bone powder and animal glue was applied before drawing. As this gave the surface a rough texture, so when the tool scraped against it, it left be

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