Problem: Sven Anders Hedin, KNO1kl RVO, (19 February 1865 - 26 November 1952) was a Swedish geographer, topographer, explorer, photographer, travel writer, and illustrator of his own works. During four expeditions to Central Asia, he made the Transhimalaya known in the West and located sources of the Brahmaputra, Indus and Sutlej Rivers. He also mapped lake Lop Nur, and the remains of cities, grave sites and the Great Wall of China in the deserts of the Tarim Basin. In his book Fran pol till pol (From Pole to Pole), Hedin describes a journey through Asia and Europe between the late 1880s and the early 1900s.

On 27 April 1892, Hedin traveled to Berlin to continue his studies under Ferdinand Freiherr von Richthofen. Beginning of July he went to University of Halle-Wittenberg, Halle, attending lectures by Alfred Kirchhoff. Yet in the same month, he received the degree of Doctor of Philosophy with a 28-page dissertation entitled Personal Observations of Damavand. This dissertation is a summary of one part of his book, King Oscar's Legation to the Shah of Persia in 1890. Eric Wennerholm remarked on the subject: I can only come to the conclusion that Sven [Hedin] received his doctorate when he was 27 years old after studying for a grand total of only eight months and collecting primary material for one-and-a-half days on the snow-clad peak of Mount Damavand. Ferdinand Freiherr von Richthofen not only encouraged Hedin to absolve cursory studies, but also to become thoroughly acquainted with all branches of geographic science and the methodologies of the salient research work, so that he could later work as an explorer. Hedin abstained from doing this with an explanation he supplied in old age: I was not up to this challenge. I had gotten out onto the wild routes of Asia too early, I had perceived too much of the splendor and magnificence of the Orient, the silence of the deserts and the loneliness of long journeys. I could not get used to the idea of spending a long period of time back in school. Hedin had therewith decided to become an explorer. He was attracted to the idea of traveling to the last mysterious portions of Asia and filling in the gaps by mapping an area completely unknown in Europe. As an explorer, Hedin became important for the Asian and European powers, who courted him, invited him to give numerous lectures, and hoped to obtain from him in return topographic, economic and strategic information about inner Asia, which they considered part of their sphere of influence. As the era of discovery came to a close around 1920, Hedin contented himself with organizing the Sino-Swedish Expedition for qualified scientific explorers.

how old was he?

Answer with quotes: Sven [Hedin] received his doctorate when he was 27 years old

Question:
Luke Skywalker is a fictional character and the main protagonist of the original film trilogy of the Star Wars franchise created by George Lucas. The character, portrayed by Mark Hamill, is an important figure in the Rebel Alliance's struggle against the Galactic Empire. He is the twin brother of Rebellion leader Princess Leia Organa of Alderaan, a friend and brother-in-law of smuggler Han Solo, an apprentice to Jedi Masters Obi-Wan "Ben" Kenobi and Yoda, the son of fallen Jedi Anakin Skywalker (Darth Vader) and Queen of Naboo/Republic Senator Padme Amidala and maternal uncle of Kylo Ren/Ben Solo. The now non-canon Star Wars expanded universe depicts him as a powerful Jedi Master, husband of Mara Jade, the father of Ben Skywalker and maternal uncle of Jaina, Jacen and Anakin Solo.
Luke Skywalker was initially called "Luke Starkiller", and went through multiple design changes. The character was at one point designed as a 60-year-old grizzled war hero, later as a Jedi Master, and as a woman. The last name "Starkiller" remained for the first few months of production, Hamill on-camera used the name 'Luke Starkiller" the sole time he referred to himself during filming. "Starkiller" was dropped due to what Lucas called "unpleasant connotations". An alternative ending pitched by George Lucas for Return of the Jedi was Luke assuming his father's role as Darth Vader after the latter's death and intending to rule in his place. Though Lawrence Kasdan favored the idea, Lucas ultimately declined, since the films were made for children. Another conclusion to the film featured the character disappearing into the wilderness akin to "Clint Eastwood in the spaghetti westerns". During the filming of the original Star Wars trilogy, George Lucas informed Hamill that he would be needed to reprise the role when he was middle aged. Lucas further explained that his role as Luke would be handing "Excalibur to the next generation". Hamill had no reaction at the time, as he thought of making Star Wars films decades in the future as an abstract concept. Hamill learned of the sequel trilogy over the summer of 2012 at a Star Wars celebration during lunch where Lucas told him one was in development. Hamill recalled shaving his beard to portray The Trickster in The Flash, then letting it grow back for the filming of his scenes. Luke's lack of screen time in The Force Awakens was due to concerns by screenwriter Michael Arndt that his presence would mean the audience would have less interest in protagonist Rey, leading to an agreement that he be removed from the plot and instead become a plot device. Hamill attended meetings for script readings, and helped conceal Luke's role in the film; instead of dialogue, he read stage directions. Abrams said it allowed him to remain involved and that his reading helped make a "better experience for everyone."
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Are there any other interesting aspects about this article?

Answer:
Luke's lack of screen time in The Force Awakens was due to concerns by screenwriter Michael Arndt