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Mexican astronomers suggest Bonilla sighting might have been a very close comet breaking up

(PhysOrg.com) -- Mexican astronomers Hector Javier Durand Manterola, Maria de la Paz Ramos Lara, and Guadalupe Cordero working out of National Autonomous University of Mexico in Mexico City, have uploaded ...

Space & Earth / Space Exploration

created Oct 19, 2011 | popularity 4.9 / 5 (10) | comments 7 | with audio podcast report

IROS gets earful on Google's self-driving cars (w/ video)

(PhysOrg.com) -- Lots of people now know about Google's self-driving car project. The latest stats find Google's fleet of robotic vehicles have done over 190,000 miles with only occasional human interventio ...

Technology / Engineering

created Oct 19, 2011 | popularity 5 / 5 (9) | comments 12 | with audio podcast report

European team suggests new way to measure scientific relevance by city

(PhysOrg.com) -- In a move that must have been at least partly aimed at provoking prideful nationalism, Lutz Bornmann of the Max Planck Society in Munich and Loet Leydesdorff from the University of Amsterdam ...

Other Sciences / Mathematics

created Mar 24, 2011 | popularity 3.5 / 5 (6) | comments 2 | with audio podcast report

City lights make air pollution worse

(PhysOrg.com) -- A new study by scientists in Los Angeles, California has found that bright city lights makes air pollution worse because the glare of the lights interferes with chemical reactions that clean ...

Space & Earth / Environment

created Dec 16, 2010 | popularity 4.7 / 5 (15) | comments 1 | with audio podcast report

Maya plumbing, first pressurized water feature found in New World

A water feature found in the Maya city of Palenque, Mexico, is the earliest known example of engineered water pressure in the new world, according to a collaboration between two Penn State researchers, an ...

Other Sciences / Archaeology & Fossils

created May 04, 2010 | popularity 4.5 / 5 (14) | comments 0 | with audio podcast

Zero carbon, zero waste city being built in Abu Dhabi (w/ Video)

(PhysOrg.com) -- A new eco-city being built in the United Arab Emirates (UAE), Masdar City, will be the world’s first clean technology city, relying entirely on renewable energy sources, and being free of ...

Technology / Energy & Green Tech

created Mar 30, 2010 | popularity 4 / 5 (30) | comments 39 | with audio podcast report

Ultracapacitors Make City Buses Cheaper, Greener

(PhysOrg.com) -- A fleet of 17 buses near Shanghai has been running on ultracapacitors for the past three years, and today that technology is coming to the Washington, DC, for a one-day demonstration. Chinese ...

Technology / Energy & Green Tech

created Oct 21, 2009 | popularity 4.5 / 5 (45) | comments 31 weblog

Ego City: Cities organized like human brains

(PhysOrg.com) -- Cities are organized like brains, and the evolution of cities mirrors the evolution of human and animal brains, according to a new study by researchers at Rensselaer Polytechnic Institute.

Medicine & Health / Medical research

created Sep 03, 2009 | popularity 4.2 / 5 (11) | comments 0

New Florida City To Run On Solar Power

(PhysOrg.com) -- A new Florida city, Babcock Ranch, will power 19,500 homes by solar power and cost the average customer's monthly bill an additional 31 cents. This will be the first city on earth powered ...

Technology / Energy & Green Tech

created Apr 13, 2009 | popularity 4.7 / 5 (77) | comments 17 weblog

Ancient Bethlehem seal unearthed in Jerusalem

Israeli archaeologists have discovered a 2,700-year-old seal that bears the inscription "Bethlehem," the Israel Antiquities Authority announced Wednesday, in what experts believe to be the oldest artifact ...

Other Sciences / Archaeology & Fossils

created May 23, 2012 | popularity 3.4 / 5 (16) | comments 39

Study shows subway systems develop in remarkably similar ways

(Phys.org) -- Visitors to major cities in the world might disagree, but a small group of French and British researchers has found that regardless of city density, structure and other factors, subway systems ...

Other Sciences / Mathematics

created May 22, 2012 | popularity 5 / 5 (5) | comments 2 | with audio podcast report

Wireless providers to disable stolen phones

(AP) -- Major wireless service companies have agreed to disable cellphones after they are reported stolen under a strategy intended to deter the theft and resale of wireless devices.

Technology / Telecom

created Apr 10, 2012 | popularity 4.5 / 5 (2) | comments 8

Venice hasn't stopped sinking after all: study

The water flowing through Venice's famous canals laps at buildings a little higher every year – and not only because of a rising sea level. Although previous studies had found that Venice has stabilized, new measurements ...

Space & Earth / Earth Sciences

created Mar 20, 2012 | popularity 3 / 5 (2) | comments 1 | with audio podcast

Columbia engineers map energy use in NYC buildings

(PhysOrg.com) -- Cities across the globe are trying to develop plans to cut down their energy consumption and lower their carbon footprint by reducing the associated greenhouse gas emissions. While initial efforts have focused ...

Technology / Energy & Green Tech

created Jan 31, 2012 | popularity 3 / 5 (1) | comments 1 | with audio podcast

Original offering found at Teotihuacan pyramid

Archaeologists announced Tuesday that they dug to the very core of Mexico's tallest pyramid and found what may be the original ceremonial offering placed on the site of the Pyramid of the Sun before construction began.

Other Sciences / Archaeology & Fossils

created Dec 14, 2011 | popularity 4.7 / 5 (7) | comments 6

City

A city is a relatively large and permanent settlement, particularly a large urban settlement. Although there are no agreed on technical definitions distinguishing a city from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law — for example an article of incorporation approved by the local cognizant (state) legislature separates towns from city government forms, rights, duties and privileges in Massachusetts — similar distinctions are made across the world, particularly in former colonies of the United Kingdom. Historically, in Europe, a city was understood to be an urban settlement with a cathedral; in later usages, especially in the United Kingdom and parts of Commonwealth of Nations, a city was a settlement with a royal charter.

Cities generally have advanced systems for sanitation, utilities, land usage, housing, and transportation and more. This proximity greatly facilitates interaction between people and businesses, benefiting both parties in the process.

A big city, or metropolis, may have suburbs and regions. Such cities are usually associated with metropolitan areas and urban sprawl, creating large numbers of business commuters. Once a city sprawls far enough to reach another city, this region can be deemed a conurbation or megalopolis.

For more information about City, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.