Article: Early research into circadian rhythms suggested that most people preferred a day closer to 25 hours when isolated from external stimuli like daylight and timekeeping. However, this research was faulty because it failed to shield the participants from artificial light. Although subjects were shielded from time cues (like clocks) and daylight, the researchers were not aware of the phase-delaying effects of indoor electric lights.[dubious discuss] The subjects were allowed to turn on light when they were awake and to turn it off when they wanted to sleep. Electric light in the evening delayed their circadian phase.[citation needed] A more stringent study conducted in 1999 by Harvard University estimated the natural human rhythm to be closer to 24 hours, 11 minutes: much closer to the solar day but still not perfectly in sync.

Question: What was the fault not considered in the early theories of day length?
Ans: artificial light

Article: The Office of the Federal Register publishes the Federal Register, Code of Federal Regulations, and United States Statutes at Large, among others. It also administers the Electoral College.

Question: What office administers the Electoral College?
Ans: The Office of the Federal Register

Article: All YouTube users can upload videos up to 15 minutes each in duration. Users who have a good track record of complying with the site's Community Guidelines may be offered the ability to upload videos up to 12 hours in length, which requires verifying the account, normally through a mobile phone. When YouTube was launched in 2005, it was possible to upload long videos, but a ten-minute limit was introduced in March 2006 after YouTube found that the majority of videos exceeding this length were unauthorized uploads of television shows and films. The 10-minute limit was increased to 15 minutes in July 2010. If an up-to-date browser version is used, videos greater than 20 GB can be uploaded.

Question: What is the upload file size limit on out of date browsers?
Ans: 20 GB

Article: The Towers Square, is an area of remarkable aesthetic design, intended to be a platform for the development of business activities, art exhibitions, dance and music performances and social place. This square connects the different buildings and towers which comprise the WTC Complex and it is the main access to the complex. The square contains various works of art, notably a sculpture by renowned Uruguayan sculptor Pablo Atchugarry. World Trade Center 4, with 40 floors and 53,500 square metres (576,000 sq ft) of space is under construction as of 2010[update].[citation needed]

Question: How much space is World Trade Center 4 projected to have?
Ans:
53,500 square metres