Carbon monoxide is a colorless, odorless, tasteless, and extremely poisonous gas. It is present in the exhaust of internal-combustion engines, such as in automobiles, and is generated in coal stoves, furnaces, and gas appliances that do not get enough air. Breathing air that contains as little as 0.1% carbon monoxide by volume can be fatal; a concentration of about 1% can cause death within a few minutes. What are the early symptoms of carbon monoxide poisoning? Discuss
Source: The Free Dictionary
Extinct since 1844, the great auk was a flightless seabird once found in great numbers on rocky islands off eastern Canada, Greenland, Iceland, Norway, Ireland, and Britain. The bird was hunted on a significant scale by humans for food, eggs, and down since at least the 8th century, but massive exploitation for its down and the collecting of its eggs eventually contributed to the demise of the species. Specimens are now exhibited in many museums. Where was the last pair of great auks killed? 
In the 
One of the greatest architects of the late 18th century, Adam was a Scottish architect and designer whose work influenced the development of Western architecture both in Europe and North America. Along with his brother James, he developed the Adam style, an essentially decorative style of architecture that is most remembered for its application in interiors and is characterized by contrasting room shapes and delicate Classical ornaments. What are some of Adam’s most famous projects? 
The tooth fairy is a character in modern Western culture that attends a child’s loss of a deciduous tooth. In Spanish and Italian culture, the tooth fairy takes the form of a little mouse. Typically, a child who has just lost a tooth places it under his or her pillow before going to sleep; in the morning, the child finds that the tooth has been replaced by a coin, a dollar bill, or a present. What is the origin of the tooth fairy character? 
After Tang Dynasty founder Emperor Gaozu named his son Li Jiancheng the crown prince, an intense rivalry developed between him and his younger brother, Li Shimin. Each prince was advised by his staff members to act first against the other, and, in 626, believing that Li Jiancheng was plotting to kill him, Li Shimin ambushed and killed the crown prince and another brother of theirs at Xuanwu Gate, which led to Emperor Gaozu’s palace. What did the emperor do when he learned of his sons’ deaths? 
As the chief legal counsel of the National Association for the Advancement of Colored People for more than 20 years, Marshall argued 32 cases before the US Supreme Court, successfully challenging racial segregation, most notably in Brown v. Board of Education. In 1967, he became the first African American appointed to the Supreme Court, a position he held until his retirement in 1991. How many of the 32 cases that Marshall argued before the Supreme Court did he win?