Article: 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, 5017,000 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.

Question: How Paleo-Indians migrated to the Americas is still a matter for what type of research?
Ans: ongoing

Article: In June 2009 the first major building work at the abbey for 250 years was proposed. A coronaa crown-like architectural featurewas intended to be built around the lantern over the central crossing, replacing an existing pyramidal structure dating from the 1950s. This was part of a wider 23m development of the abbey expected to be completed in 2013. On 4 August 2010 the Dean and Chapter announced that, "[a]fter a considerable amount of preliminary and exploratory work", efforts toward the construction of a corona would not be continued. In 2012, architects Panter Hudspith completed refurbishment of the 14th-century food-store originally used by the abbey's monks, converting it into a restaurant with English Oak furniture by Covent Garden-based furniture makers Luke Hughes and Company.

Question: What was proposed for the abbey in June 2009?
Ans: major building work

Article: However, an analysis by the Regional Data Cooperative for Greater New Haven, Inc., has shown that due to issues of comparative denominators and other factors, such municipality-based rankings can be considered inaccurate. For example, two cities of identical population can cover widely differing land areas, making such analyses irrelevant. The research organization called for comparisons based on neighborhoods, blocks, or standard methodologies (similar to those used by Brookings, DiversityData, and other established institutions), not based on municipalities.

Question: What constant in two cities can create disparities in analysis by way of distribution over differing land areas?
Ans: identical population

Article: The GSM Association (GSMA) followed suit on 17 February 2009, and on 22 April 2009, this was further endorsed by the CTIA The Wireless Association, with the International Telecommunication Union (ITU) announcing on 22 October 2009 that it had also embraced the Universal Charging Solution as its "energy-efficient one-charger-fits-all new mobile phone solution," and added: "Based on the Micro-USB interface, UCS chargers will also include a 4-star or higher efficiency ratingup to three times more energy-efficient than an unrated charger."

Question: When did the GSM Association follow suit?
Ans:
17 February 2009