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Expert-reviewed information about the Earth.  For everyone.

 

 

  • Gymnosperm Featured Article Gymnosperm Gymnosperm

    A gymnosperm is one of a number of non-flowering seed bearing vegetation species, including conifers, cycads, Ginkgo and Gnetales.  These species arose first in the... More »

  • Endangered species Featured Article Endangered species Endangered species

    An endangered species is a biological taxon that is at risk of becoming extinct in a proximate time frame much sooner than the long term horizon in which species typically... More »

  • Fluorine Featured Article Fluorine Fluorine

    Fluorine is a highly reactive chemical element with atomic symbol F. Having the atomic number nine, fluorine is the lightest halogen. Fluorine is a yellow-green gas... More »

  • Dugong Featured Article Dugong Dugong

    The Dugong, often referred to as the sea cow, is actually more closely related to elephants than to the bovine namesake.  Throughout much of their range, the Dugong has... More »

  • Limestone Featured Article Limestone Limestone

      Limestone  is a sedimentary rock whose chief mineral component is calcite (calcium carbonate: CaCO3). Limestone can be formed by precipitation of calcite... More »

  • Carpenter bee Featured Article Carpenter bee Carpenter bee

    This hexapod (six-legged) insect is a bee in the subfamily Xylocoinae of either the genus Ceratina or Xylocopa that makes its nest in wood or plant stems. Along... More »

  • Composting tips Featured Article Composting tips Composting tips

    Composting turns household wastes into valuable fertilizer and soil organic matter. All organic matter eventually decomposes. Composting speeds the process by providing an... More »

  • Healthy Community Design Featured Article Healthy Community Design Healthy Community Design

    The way we design and build our communities can affect our physical and mental health. Healthy community design integrates evidence-based health strategies into community... More »

Recently Updated
The Role of Botanic Gardens in Conservation of Medicinal Plant Species: A Case Study of Entebbe Bontanic Gardens Last Updated on 2014-10-21 11:20:56 A botanic garden is an institution holding documented collections of living plants for the purposes of scientific research, conservation, display and education. A botanic garden has been defined as a garden containing scientifically ordered and maintained collections of plants, usually documented and labeled, and open to the public for the purposes of recreation, education and research. Medicinal plant species are those that provide people with medicines to prevent diseases, maintain health or cure ailment. Therefore medicinal plants are important in the well being of people yet most people are not aware about these species or their medicinal value. Examples of these plants include Aloe vera, Hydnocarpus kurzii, Azadirachta indica and many others. Medicinal plant species are of great value to mankind and other animals but not much emphasis is laid on their conservation especially... More »
India Last Updated on 2014-10-19 18:29:14 India is one of the major nations of the world. With 1,205 million people, it has the second largest population (after China). It is bordered by the Arabian Sea and Indian Ocean in the south, east and west. To the North, it borders Bangladesh, Bhutan, Myanmar (Burma), China, Nepal, and Pakistan. India has a long and complex history reflected in its intricate mixture of ethnic groups, languages and cultures. While, density populated, India is home to a wide range of varied ecoregions with important biodiversity.  Its major environmental issues include: deforestation; soil erosion; overgrazing; desertification; air pollution from industrial effluents and vehicle emissions; water pollution from raw sewage and runoff of agricultural pesticides and herbicides; tap water is not potable throughout the country; and, its huge and growing... More »
Sundarbans, Bangladesh Last Updated on 2014-10-19 18:16:11 The Sundarbans (21°30'- 22°30'N, 89°12'-90°18'E) are a World Heritage Site which consists of three wildlife sanctuaries (Sundarbans West, East and South) lying on disjunct deltaic islands in the Sundarbans Forest Division of Khulna District, close to the border with India and immediately west of the principal outflow of the Ganges, Brahmaputra and Meghna rivers. The Sundarbans belong to Bengalian Rainforest biogeographical province. 1977: All three wildlife sanctuaries established under the Bangladesh Wildlife (Preservation) (Amendment) Act, 1974, 1878: The three sanctuaries gazetted as forest reserves. 1996: The total area of wildlife sanctuaries extended; the entire Sundarbans is reserved forest, established under the Indian Forest Act, 1878. 1997: The Sundarbans inscribed on the World Heritage List. The total area of the Bangladesh... More »
Ecoregions of Bangladesh Last Updated on 2014-10-19 17:45:45 Bangladesh has five ecoregions: Sundarbans mangroves Sundarbans freshwater swamp forests Lower Gangetic Plains moist deciduous forests Mizoram-Manipur-Kachin rain forests Myanmar coastal rain forests The ecoregion lies in the vast delta formed by the confluence of the Ganges, Brahmaputra, and Meghna rivers. The maze of mangrove channels extends across southern Bangladesh and India's West Bengal State.The Sundarbans Mangroves ecoregion is the world's largest mangrove ecosystem. Named after the dominant mangrove species Heritiera fomes, locally known as sundri, this is the only mangrove ecoregion that harbors the Indo-Pacific region's largest predator, the tiger (Panthera tigris). Unlike in other habitats, here tigers live and swim among the mangrove islands, where they hunt scarce prey such as chital deer (Cervus axis), barking deer (Muntiacus muntjak), wild... More »
Bangladesh Last Updated on 2014-10-19 17:39:12 Bangladesh is a nation of over 160 million people in southern Asia, bordering the Bay of Bengal, between Myanmar (Burma) and India. Most of the country is situated on deltas of large rivers flowing from the Himalayas: the Ganges unites with the Jamuna (main channel of the Brahmaputra) and later joins the Meghna to eventually empty into the Bay of Bengal Its major environmental issues include: many people are landless and forced to live on and cultivate flood-prone land; waterborne diseases prevalent in surface water; water pollution, especially of fishing areas, results from the use of commercial pesticides; ground water contaminated by naturally occurring arsenic; intermittent water shortages because of falling water tables in the northern and central parts of the country; soil degradation and erosion; deforestation; and, severe overpopulation.... More »