Jerusalem: A recent, 14-year dry spell in the Middle East was the worst drought in the past 900 years, according to a new NASA study released this week.

NASA's researchers examined records of rings of trees in several Mediterranean countries to determine patterns of dry and wet years across a span of 900 years. They concluded that the years from 1998 to 2012 were drier than any other period, and that the drought was likely caused by humans.