News tagged with human population
Scientists discover novel mechanism by which calorie restriction influences longevity
Scientists at the Gladstone Institutes have identified a novel mechanism by which a type of low-carb, low-calorie diet—called a "ketogenic diet"—could delay the effects of aging. This fundamental discovery reveals how ...
Medical research
Dec 06, 2012 |
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Population genetics reveals shared ancestries
More than just a tool for predicting health, modern genetics is upending long-held assumptions about who we are. A new study by Harvard researchers casts new light on the intermingling and migration of European, Middle Eastern ...
Genetics
May 24, 2011 |
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Scientists pinpoint brain's area for numeral recognition
Scientists at the Stanford University School of Medicine have determined the precise anatomical coordinates of a brain "hot spot," measuring only about one-fifth of an inch across, that is preferentially activated ...
Neuroscience
Apr 16, 2013 |
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'Promiscuous parasites' hijack host immune cells
Toxoplasma gondii parasites can invade your bloodstream, break into your brain and prompt behavioral changes from recklessness to neuroticism. These highly contagious protozoa infect more than half the wo ...
Medical research
Sep 20, 2011 |
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China researchers link obesity to bacteria
Chinese researchers have identified a bacteria which may cause obesity, according to a new paper suggesting diets that alter the presence of microbes in humans could combat the condition.
Overweight and Obesity
Dec 19, 2012 |
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Researchers discover gene that suppresses herpesviruses
Kaposi's sarcoma-associated herpesvirus (KSHV) and Epstein-Barr virus (EBV) hide within the worldwide human population. While dormant in the vast majority of those infected, these active herpesviruses can ...
Medical research
Feb 13, 2013 |
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As population exploded, more rare genes entered human genome
(Medical Xpress) -- As the Earth's human population has skyrocketed since the rise of agriculture some 10,000 years ago -- to 7 billion people from a few million -- so, too, has the number of rare genetic variants.
Genetics
May 11, 2012 |
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World's most advanced genetic map created
A consortium led by scientists at the University of Oxford and Harvard Medical School has constructed the world's most detailed genetic map.
Genetics
Jul 20, 2011 |
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1,092 genomes and counting
Focusing on fine features in order to see "the big picture" seems almost counterintuitive, but that is exactly what is happening in the field of genomics. Researchers are sequencing human genomes, cataloging ...
Genetics
Nov 16, 2012 |
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Team finds mechanism that regulates production of energy-burning brown fat
Joslin scientists have discovered a mechanism that regulates the production of brown fat, a type of fat which plays an important role in heat production and energy metabolism. The findings, which appear in the upcoming issue ...
Medical research
Mar 13, 2013 |
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A history lesson from genes: Using DNA to tell us how populations change
When Charles Darwin first sketched how species evolved by natural selection, he drew what looked like a tree. The diagram started at a central point with a common ancestor, then the lines spread apart as ...
Genetics
Jan 09, 2013 |
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Stem-cell-based strategy boosts immune system in mice
Raising hopes for cell-based therapies, UC San Francisco researchers have created the first functioning human thymus tissue from embryonic stem cells in the laboratory. The researchers showed that, in mice, ...
Immunology
May 16, 2013 |
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Basque roots revealed through DNA analysis
The Genographic Project announced today the most comprehensive analysis to date of Basque genetic patterns, showing that Basque genetic uniqueness predates the arrival of agriculture in the Iberian Peninsula some 7,000 years ...
Genetics
Mar 06, 2012 |
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The key (proteins) to self-renewing skin
In the July 6 issue of Cell Stem Cell, researchers at the University of California, San Diego School of Medicine describe how human epidermal progenitor cells and stem cells control transcription factors to avo ...
Medical research
Jul 05, 2012 |
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Study shows that human hearts generate new cells after birth
Researchers at Boston Children's Hospital have found, for the first time that young humans (infants, children and adolescents) are capable of generating new heart muscle cells. These findings refute the long-held belief that ...
Medical research
Jan 10, 2013 |
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World population
The term world population commonly refers to the total number of living humans on Earth at a given time. As of 29 July 2009, the Earth's population is estimated by the United States Census Bureau to be 6.774 billion. The world population has been growing continuously since the end of the Black Death around 1400. There were also short term falls at other times due to plague, for example in the mid 17th century (see graph). The fastest rates of world population growth (above 1.8%) were seen briefly during the 1950s then for a longer period during the 1960s and 1970s (see graph). According to population projections, world population will continue to grow until around 2050. The 2008 rate of growth has almost halved since its peak of 2.2% per year, which was reached in 1963. World births have levelled off at about 134-million-per-year, since their peak at 163-million in the late 1990s, and are expected to remain constant. However, deaths are only around 57 million per year, and are expected to increase to 90 million by the year 2050. Since births outnumber deaths, the world's population is expected to reach about 9 billion by the year 2040.
For more information about World population, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
