"Water Wars" loom? But none in past 4,500 years
12547
With a steady stream of bleak   predictions that "water wars" will be fought over dwindling   supplies in the 21st century, battles between two Sumerian   city-states 4,500 years ago seem to set a worrying precedent.
368219
By Michael Hill  ALBANY, N.Y. - The tree stood tall and spindly in the hot sun 380 million years ago until something toppled it, maybe a storm or an earthquake.   It fell into water and dammed up in a muddy delta.
261544
A vast underground lake in Darfur probably dried out thousands of years ago, a geologist says.
381999
For years, geologists and devoted amateurs have lobbied for a regional trail dedicated to ice-age floods. At last, their efforts may pay off.
592331
JACKSON HOLE, Wyoming -- There is mounting evidence of the role of water  in Mars' evolution. That fact appears to have been favorable to the  development of life -- and the leftover calling card of past biology may be  preserved in that world's geologic record.
463504
Is a sea change about to occur? Don't count on it.
267698
Sept. 8, 2004 - Mars may be cold, dry and dusty today but it once had a watery climate that lasted for much of its history, according to a study published in the British science journal Nature on Thursday.
478700
The Olympic Games are a week old! Not bad for an event first recorded in 776 BC. The Games have so far gone much better than anyone really expected.
218049
Blog: No need to reset your watch yet, but redistribution of ocean mass could make days a fraction of a second shorter in the next 200 years.
762475
A new look at climate conditions 55 million years ago shows that the Earth is more sensitive to small changes than previously believed.
329964
This much is known: At some point in Mars's past, at least one region of the planet was drenched in water. Ancient Mars provided a habitat suitable for life as we know it. What kind of organism might have lived there? And is life lying dormant there still, just waiting for things to warm up a bit?
723783
The signs of the scuffle were fresh but it is a struggle that has gone on for tens of millions of years.
591438
People have lived with rain and snow for millennia, and scientists have studied weather for more than a century. You might think that, after all that time, we would have precipitation pretty much figured out.
731304
Our heavy-browed competitors lasted 2,000 years longer than previously thought, a new cave find suggests&#151;though not everyone agrees on the dates.
177401
&#8230;. history has the tendency to repeat itself over and over again. No, humans do not learn from past mistakes of their ancestors. They might learn from their own past mistakes, but that will be gone and forgotten by the next generation already. I wouldn&#8217;t be surprised if this little introduction raised an eyebrow or two [...]
57299
Imagine ancient Rome before its fall: The some 1,350 fountains still trickle with water, the 1,790 palaces haven't fallen to ruins and the 240 public latrines are still in business.
567050
A 300-year old system has been criticized for decades as outmoded, unsupervised and unfair.