Who led the first expedition to successfully circumnavigate the earth between 1519 and 1522, and was killed during the voyage?
Which of these members of Robert Falcon Scott's expedition to the South Pole in 1912 sacrificed himself in an attempt to ensure that there to be sufficient provisions for the rest of the team?
In 1935 and 1937, Danish-Norwegian Caroline Mikkelsen and Norwegian Ingrid Christensen became the first women to do what?
