Chalk streams are watercourses originating from chalk hills, where rainwater soaks into the ground and is trapped by porous chalk rock. The chalk acts as an aquifer, filtering the water that passes through it and creating a clear, mineral-rich spring lower down on the slope. Because the chalk also regulates the flow of water to the waterway below, there is little day-to-day variation in the amount of water entering the stream. Such conditions make chalk streams an ideal venue for what activity?
Back in the day
On this day, Marshal Deodoro da Fonseca deposed Emperor Pedro II, declared Brazil a republic, and began reorganizing the country's government. The republicans named Fonseca president, but his government was divided by the animosity between him and his vice president, Floriano Peixoto, and public opinion of the president soon soured. Instability and violence characterized the decade that followed. What export crop led to significant developments in Brazil's economy during this period?
Born on a day like today
One of the best known US painters of the 20th century, O'Keeffe is known chiefly for her large, semi-abstract studies of flowers, bones, and other imagery. Immaculate, sculptural, organic forms painted in strong, clear colors predominate in O'Keeffe's works, and her pristine abstract designs carry strong elements of sexual symbolism. Her work was first exhibited in 1916 at the 291 Gallery of Alfred Stieglitz, whom she married in 1924. In 1928, a group of O'Keeffe's paintings sold for what price?