In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Q: How was access gained to Alaska, Context: The specifics of Paleo-Indian migration to and throughout the Americas, including the exact dates and routes traveled, provide the subject of ongoing research and discussion. According to archaeological and genetic evidence, North and South America were the last continents in the world with human habitation. During the Wisconsin glaciation, 50–17,000 years ago, falling sea levels allowed people to move across the land bridge of Beringia that joined Siberia to north west North America (Alaska). Alaska was a glacial refugia because it had low snowfall, allowing a small population to exist. The Laurentide Ice Sheet covered most of North America, blocking nomadic inhabitants and confining them to Alaska (East Beringia) for thousands of years.

A: the land bridge
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Q: Where do Northwestern play?, Context: Northwestern fields 19 intercollegiate athletic teams (8 men's and 11 women's) in addition to numerous club sports. The women's lacrosse team won five consecutive NCAA national championships between 2005 and 2009, went undefeated in 2005 and 2009, added more NCAA championships in 2011 and 2012, giving them 7 NCAA championships in 8 years, and holds several scoring records. The men's basketball team is recognized by the Helms Athletic Foundation as the 1931 National Champion. In the 2010–11 school year, the Wildcats had one national championship, 12 teams in postseason play, 20 All-Americans, two CoSIDA Academic All-American selections, 8 CoSIDA Academic All0District selections, 1 conference Coach of the Year and Player of the Year, 53 All-Conference and a record 201 Academic All-Big Ten athletes. Overall, 12 of Northwestern's 19 varsity programs had NCAA or bowl postseason appearances.

A: NCAA
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Q: The light to no snowfall happened despite?, Context: Even at high latitudes, glacier formation is not inevitable. Areas of the Arctic, such as Banks Island, and the McMurdo Dry Valleys in Antarctica are considered polar deserts where glaciers cannot form because they receive little snowfall despite the bitter cold. Cold air, unlike warm air, is unable to transport much water vapor. Even during glacial periods of the Quaternary, Manchuria, lowland Siberia, and central and northern Alaska, though extraordinarily cold, had such light snowfall that glaciers could not form.

A:
though extraordinarily cold
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