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John Glenn (July 18, 1921 – December 8, 2016) was a United States Marine Corps aviator, astronaut, and politician. Before joining NASA, Glenn was a distinguished fighter pilot in World War II, the Chinese Civil War and the Korean War. In 1957, he made the first supersonic transcontinental flight across the United States. He was one of the Mercury Seven, military test pilots selected in 1959 by NASA as the nation's first astronauts. On February 20, 1962, Glenn flew the Friendship 7 mission, becoming the first American to orbit the Earth, and the fifth person and third American in space. After retiring from NASA, he served from 1974 to 1999 as a Democratic U.S. senator from Ohio. In 1998, Glenn flew on the Space Shuttle Discovery mission STS-95, making him the oldest person to enter Earth orbit and the only person to fly in both Project Mercury and the Space Shuttle program. He received the Presidential Medal of Freedom in 2012. (Full article...)

John D. Whitney (July 19, 1850 – November 27, 1917) was an American Catholic priest who was the president of Georgetown University from 1898 to 1901. Born in Massachusetts, he joined the United States Navy at the age of sixteen. He became a Jesuit in 1872 and spent the next twenty-five years studying and teaching mathematics at Jesuit institutions in Canada, England, Ireland, and the United States. He became the vice president of Spring Hill College in Alabama before becoming the president of Georgetown. He oversaw the completion of Gaston Hall, the construction of the entrances to Healy Hall, and the establishment of Georgetown University Hospital and what would become the School of Dentistry. Afterwards, Whitney became the treasurer of Boston College and then engaged in pastoral work in Philadelphia, Brooklyn, and Baltimore, where he became the prefect of St. Ignatius Church. (This article is part of a featured topic: Presidents of Georgetown University.)

The Alpine ibex (Capra ibex), also known as the steinbock, is a species of goat that lives in the Alps of Europe. Its closest living relative is the Iberian ibex. They have brownish-grey coats and sharp hooves adapted to steep, rough terrain. Found at elevations as high as 3,300 metres (10,800 ft), they are active throughout the year, primarily feeding on grass in open alpine meadows. Adult males, which are larger than the females, segregate from them for most of the year, coming together only during the breeding season, when they fight for access to the females using their long horns. The Alpine ibex has been successfully reintroduced to parts of its historical range, but all individuals living today descend from a population bottleneck of fewer than 100 individuals from Gran Paradiso National Park in Italy. The species has few predators and is not threatened, but it has very low genetic diversity. (Full article...)