developed dye

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Space race (1957-1969) infographic between United States (U.S.) and Russia. America, Soviet Union, U.S.S.R., space exploration

Timeline of the Space Race, 1957–69

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Big beaver gnawing on limb at river's edge

6 Animal Species that Mate for Life

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

developed dye

coloring agent

Learn about this topic in these articles:

application of azo dyes

In azo dye
…in this way are called developed dyes; para red and primuline red are members of this group that were introduced in the 1880s.
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