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1 day ago · A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk-producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
5 hours ago · Dolphin. A dolphin is an aquatic mammal in the clade Odontoceti ( toothed whale ). Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins ), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).
1 day ago · 2001: The War in Afghanistan – Operation Enduring Freedom. Within two months of the attacks on September 11, 2001, Marines were the first major ground forces in Afghanistan, focused on defeating Al-Qaeda. By mid-December Marine forces had captured Kandahar Airport, creating one of the first coalition command centers.
1 day ago · It is only small compared to other cetaceans, however. By any other standard, the narwhal is actually a large marine mammal with a body size of 13 to 20 feet and a tusk size of around 10 feet. It also weighs a truly imposing 1.5 tons. This makes it nearly the length of a bus and the weight of a car.
1 day ago · The domestic cat has a smaller skull and shorter bones than the European wildcat. [48] It averages about 46 cm (18 in) in head-to-body length and 23–25 cm (9.1–9.8 in) in height, with about 30 cm (12 in) long tails. Males are larger than females. [49] Adult domestic cats typically weigh 4–5 kg (8.8–11.0 lb).
2 days ago · Some species resemble placental mammals and are examples of convergent evolution. This convergence is evident in both brain evolution [8] and behaviour. [9] The extinct thylacine strongly resembled the placental wolf, hence one of its nicknames "Tasmanian wolf".
5 days ago · Diversity [1] 132 families, c. 50,000 species. Spiders ( order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, [2] and spinnerets that extrude silk. [3] They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms.
