Dr. TRENBERTH: Well, one of the ironical things in the West in particular is that most of the water rights and the water allocations were set based upon a relatively wet period during something like the first 20 years of the 20th century.
And the very heavy rainfall, which is the top 1 percent of events, went up at a rate of 20 percent over the 20th century.
In the last century, 20 countries ended up with hyperinflations by using the printing press to avoid taking fiscal responsibility.
The report blames industrial pollution from the 19th century for climate change from the mid-20th century, although the recent warming trend set in about 20 years ago from the cumulative use of fossil fuels giving off clear greenhouse gases such as methane and carbon dioxide.
If the global trend continues for the next 20 years, then global growth in the 21st century will ring in at a clip superior to the historic period we call the Great Dollar Standard Era from the breakdown of Bretton Woods in 1971 through the palliative Y2K freakout.
Her mother's native Germany had some 20 principalities in the 19th century, each with its monarch.
Two rich monks took over the site in the 16th Century and it took more than 20 years to hoist all of the building materials to the top.
By feeding into his model both some recent science on the increased risks of dramatic climate change, and the possibility of such catastrophes as a rise in sea level big enough to flood London and New York, he calculates that the range of possible outcomes lies somewhere between 5% and 20% of global output over the next century or two.
While the documents do little to answer questions about the alleged suspect's possible motive in the July 20 shooting during a showing of the Batman movie at the Century 16 multiplex, they offer new insight into Holmes as a student and his aspirations to study the human brain.
Early in the 21st century, more than 20 of this assembly's members, home to half the earth's population, will lift themselves from the ranks of low-income nations.
There is a long history of schools using technologies to, in effect, sustain the chalkboard and prop up the 20th-century factory model classroom with the teacher in front of 20 to 30 students of the same age.
But this century, and particularly the past 20 years, has seen an unhealthy concentration of political, cultural and economic power around London and the South-East.
While the SEC seems intent on entering the 21st century, if at a belated pace, it still took the regulators about 20 minutes to tweet a press release about the regulatory update.
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Recent research from the Reason Foundation finds the cost of all-electronic toll collection is just 5% of the revenue generated, compared with the 20% to 30% inherent in 20th-century cash-toll collection.
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By mid-century the percentage will be more than 20%.
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Federal spending has averaged 20.2% over the past half-century.
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The work on the Liverpool Guild of Students, due to finish in 2014, will deliver a "21st Century space" for the university's 20, 000 students.
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They discovered that 20 of the pieces, including works by leading 16th and 17th Century English composers, were completely new discoveries, and had only survived in the Chirk collection.
In practice, this has been anywhere from 8 to 20 years, with approximately 17 years being the average of the past century.
After a meal of filet of kangaroo -- deliciously tender in a light pepper sauce, and served in the elegant dining room -- I wandered over to the century-old stone Woolshed Winery where estate-bottled wines and 20 other labels from local wineries are on sale at the cellar door.
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Though historians disagree on how to value 16th-century currency, we know that Stratford schoolteachers of the day earned around 20 pounds a year.
Although Hamilton Masakadza again showed his unfulfilled potential, belying his average of just 26.20 with a gritty second-innings century in a losing cause in the second Test.
First, the pattern for raw material prices over the past century has seen roughly a 10-year upswing followed by a 10 to 20-year secular bear market.
If the volume of knowledge at the dawn of the 20th century could fit into a shoebox, that knowledge today would fill Gillette Stadium 20 times over.
Not surprisingly, Mr Gandhi is trying to revive the fortunes of his party in the politically crucial state of Uttar Pradesh, which hasn't seen a Congress government in a quarter of a century - the last time the party even inched close to 100 seats was 20 years ago.
Katich reached his half century off 86 balls but the partnership came to an end when Symonds, on 20, tried to hook a short ball from Martin and edged to McCullum.
From 2006 through 2012, Philadelphia's population grew by 58, 897 after falling for half a century, with 20- to 34-year-olds' share of the population up to 26% from 20%, according to Census estimates.
Less than a year before his assassination, Kennedy challenged the Marine Corps to cover 50 miles on foot in 20 hours, an homage to a command originated by Teddy Roosevelt at the turn of the century.
The 20-year period from say 1912, when Leo Ornstein, aged 20, began composing in a highly individual style, was perhaps the most creative of the 20th century.
Horowitz, in the 20 years since his death, has only gained in stature as one of the titans of 20th-century music.
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