Rubies are precious gemstones that range in color from light pink to blood red and are second only to the diamond in hardness. They are found chiefly in Myanmar, Thailand, and Sri Lanka and are classified among the most valuable of gems. The rare star ruby, which shows an internal star-shaped formation when cut into a cabochon, is an example of a gemstone whose value is actually increased by an inclusion. Why can rubies be found beneath building foundations in some Asian countries? Discuss
Source: The Free Dictionary
Known as the Mad Bomber, George P. Metesky terrorized New York City for 16 years in the 1940s and 1950s with dozens of explosive devices that he planted in terminals, libraries, offices, phone booths, storage lockers, and restrooms in public buildings. He also bombed movie theaters by hiding his bombs within the upholstery of the seats. Metesky planted at least 33 bombs, and despite the fact that he often placed warning calls in advance of his bombings, 15 people were injured. Why did he do it? 
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Bacon was a British statesman and philosopher widely regarded as the father of modern scientific method. His elaborate classification of the sciences inspired the 18th-century French Encyclopedists, and his empiricism inspired 19th-century British philosophers of science. Bacon began his public career as a member of Parliament, later serving as attorney general and lord chancellor. However, his career as a public servant ended when he was convicted and briefly imprisoned in 1621 for what crime? 
The fortress of Terezín was constructed in the late 18th century in what is now the Czech Republic. In the early 1900s, it held famed prisoner Gavrilo Princip, who assassinated the Archduke of Austria, causing the outbreak of WWI. The Nazis took control of Terezín in 1940 and quickly turned it into concentration camp called Theresienstadt. The camp was presented to the outside world as a model Jewish settlement, but of the approximately 144,000 Jews sent to Theresienstadt, how many survived? 
Eyak is an extinct language that was spoken in Alaska, near the mouth of the Copper River. Marie Smith Jones, the language’s last native speaker, as well as the last full-blooded Eyak, died in 2008 at the age of 89. Before her death, she worked with experts to compile a dictionary that would allow future generations to revive the language. With no native speakers left in the world, Eyak became a symbol in the effort against language extinction. Which languages are the closest relatives to Eyak?