What is the significance of these color mappings? (courtesy: Dinky)
Answer: The cardinal directions (NESW and Center -- the columns in the color matrix) in Far-East cultures were associated with certain colors that were used to name various geographical features, e.g. Red Sea, Black Sea etc. Krithi, Dinesh, Manix, Divya Shankar, and mekie got it. Well done.
Answer: The Missouri Compromise (and its extensions) between pro-slavery and anti-slavery factions that prohibiting slavery in western territories north of the 36°30' parallel (green line) except in the boundaries of the proposed state of Missouri (left blank). Krithi, mekie, Iam, jamie got it. Well done.
Answer: The sensational, and now disputed, discovery of microbes in Mono Lake, CA, that switched Phosphorus for Arsenic in their DNA. matti tapaninen, NJ, Jaggi, Dhruv, AJ, mekie, IamAlwaysDemethylated, Dinesh, Mihir, Divya Shankar, and Hari got it. Nicely done.
Answer: The spot marks the location on the bus in Montgomery, Alabama on DEcember 1, 1955,where Rosa Parks sat when she was asked to move to the back of the bus. Dinesh, illiteratepoet, matti tapaninen, Divya Shankar, and Manix got it. Well done.