Paul Walden (Latvian: Pauls Valdens; 1863–1957) was a Russian and Latvian-German chemist known for his work in stereochemistry and history of chemistry. In particular he invented the stereochemical reaction known as Walden inversion and synthesized the first room-temperature ionic liquid, ethylammonium nitrate.
Read more about Paul Walden: Early Years, Work in Chemistry, Late Years
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“Be not afraid!”
—John Paul II [Karol Wojtyla] (b. 1920)
“When I wrote the following pages, or rather the bulk of them, I lived alone, in the woods, a mile from any neighbor, in a house which I had built myself, on the shore of Walden Pond, in Concord, Massachusetts, and earned my living by the labor of my hands only. I lived there two years and two months. At present I am a sojourner in civilized life again.”
—Henry David Thoreau (1817–1862)