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Mammals – Mammalogy (Martindale’s Reference Desk)

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mammal : any of a class (Mammalia) of warm-blooded higher vertebrates (such as placentals, marsupials, or monotremes) that nourish their young with milk secreted by mammary glands, have the skin usually more or less covered with hair, and include humans — Webster

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Mammals are the vertebrates within the class Mammalia, a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands. Females of all mammal species nurse their young with milk, secreted from the mammary glands.

Mammals include the largest animal on the planet, the blue whale. The basic body type is a terrestrial quadruped, but some mammals are adapted for life at sea, in the air, in trees, underground or on two legs. The largest group of mammals, the placentals, have a placenta, which enables the feeding of the fetus during gestation. Mammals range in size from the 30–40 mm (1.2–1.6 in) bumblebee bat to the 30-meter (98 ft) blue whale. With the exception of the five species of monotreme (egg-laying mammals), all modern mammals give birth to live young. Most mammals, including the six most species-rich orders, belong to the placental group. The largest orders are the rodents, bats and Soricomorpha (shrews and allies). The next three biggest orders, depending on the biological classification scheme used, are the Primates (apes and monkeys), the Cetartiodactyla (whales and even-toed ungulates), and the Carnivora (cats, dogs, seals, and allies). — Wikipedia

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Mammals News -- ScienceDaily Mammals in the news, wild mammals, mammal conservation efforts, and domesticated mammals.

  • The return of the wolves
    on May 20, 2019 at 3:56 pm

    Researchers examine global strategies for dealing with predators. […]

  • Scientists propose rethinking 'endangered...
    on May 17, 2019 at 12:16 pm

    Conservation decisions based on population counts may fail to protect large, slow-breeding animals from irrevocable decline, according to new research. […]

  • True identity of imposter 'pigs' on 17th century...
    on May 16, 2019 at 5:17 pm

    Which came first, the pigs or the pioneers? In Barbados, that has been a historical mystery ever since the first English colonists arrived in 1627 to encounter what they thought was a herd of wild European pigs. Research is shedding new light on the mystery and the altering of New World environments. […]

  • Dolphin ancestor's hearing was more like hoofed...
    on May 15, 2019 at 12:54 pm

    Paleontologists are looking into the evolutionary origins of the whistles and squeaks that dolphins and porpoises make -- part of the rare echolocation ability that allows them to effectively navigate their dark environment. […]

  • Escaped pet parrots are now naturalized in 23 US...
    on May 14, 2019 at 8:22 pm

    Research data on bird sightings finds that 56 different parrot species have been spotted in 43 states, and 25 of those species are now breeding in the wild in 23 different states. […]


Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • The return of the wolves
    on May 20, 2019 at 4:30 pm

    The current return of wolves to human-dominated landscapes poses a major challenge for the protection of this species, says conservation biologist and private lecturer (PD) Dr. Marco Heurich from the University of Freiburg. He emphasizes that conflicts arise around the conservation of wolves in these landscapes due to farm animal slaughter, competition with hunters and human protection. The question of how humans can coexist with predators triggers a strong emotional debate. Based on these […]

  • Size is everything, ecologist finds
    on May 20, 2019 at 4:01 pm

    Natural ecosystems are as vulnerable as they are diverse. Environmental changes such as climate change, pollution or the spread of alien species can easily throw an ecosystem off balance. Researchers are therefore investigating how susceptible ecosystems are to disruption. But in their search for answers they face the problem that the complex network of relationships includes innumerable interactions, which are virtually impossible to record comprehensively and convert into measurable data. […]

  • Climate change has long-term impact on species...
    on May 20, 2019 at 3:33 pm

    Historic climate change events can have a lasting impact on the genetic diversity of a species, reveals a new study published in Current Biology. This unexpected finding emerged from an analysis of the alpine marmot's genome. […]

  • Museum volunteers discover new species of extinct...
    on May 17, 2019 at 2:20 pm

    When the bones of an ancient heron were unearthed at a North Florida fossil site, the find wasn't made by researchers but by two Florida Museum of Natural History volunteers. […]

  • Study reveals role of neonatal brain cells in...
    on May 17, 2019 at 12:45 pm

    What drives the social bond between offspring and caregivers in the first few days of life? A Yale-led team of researchers has found clues in specific neurons in the brains of neonatal mice that are associated with feeding. […]