Now you see it…
“In 1997, the average lifespan of a web page was 44 days; in 2003, it was 100 days. Links go bad even faster. A 2008 analysis of links in 2,700 digital resources … found that about 8 percent of links stopped working after one year. By 2011 … 30 percent of links in the collection were dead.” Adrianne Lafrance, “Raiders of the Lost Web,” The Atlantic, October 14, 2015