Diseases, Conditions, Syndromes

Researchers analyzing coronavirus genome to develop vaccine

A team of researchers at the University of Georgia are developing and testing new vaccines and immunotherapies to combat the novel coronavirus that has infected hundreds of thousands across the world.

Diseases, Conditions, Syndromes

Understanding social distancing and how it helps

Social distancing is the least restrictive means to contain a pandemic. But considering the widespread misunderstanding about the term, it makes sense to start with what social distancing is not.

Diseases, Conditions, Syndromes

The COVID-19 coronavirus epidemic has a natural origin, scientists say

The novel SARS-CoV-2 coronavirus that emerged in the city of Wuhan, China, last year and has since caused a large scale COVID-19 epidemic and spread to more than 70 other countries is the product of natural evolution, according ...

Genetics

New clues into the genetic origins of schizophrenia

The first genetic analysis of schizophrenia in an ancestral African population, the South African Xhosa, appears in the Jan. 31 issue of the journal Science. An international group of scientists conducted the research, including ...

Diseases, Conditions, Syndromes

What the latest coronavirus tells us about emerging new infections

Viruses are quick studies. They're prolific at adapting to new environments and infecting new hosts. As a result they are able to jump the species divide from animals to humans—as the new coronavirus in China is showing.

Diseases, Conditions, Syndromes

5 things everyone should know about coronavirus

An unusual outbreak of pneumonia in China in December presented a medical mystery that may have been solved with the identification of a never-before-seen coronavirus, now known as the 2019 novel coronavirus—but many more ...

page 1 from 22

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.

This text uses material from Wikipedia, licensed under CC BY-SA