http://gigazine.net/news/20140129-100-most-influential-books/

http://wired.jp/2014/01/27/black-holes/

http://www.yomiuri.co.jp/e-japan/kanagawa/news/20140128-OYT8T01503.htm

http://headlines.yahoo.co.jp/hl?a=20140129-00000529-san-soci

http://www.yomiuri.co.jp/national/news/20140129-OYT1T00043.htm?from=ylist

http://headlines.yahoo.co.jp/hl?a=20140129-00000051-jij-soci