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22 hours ago · The sea otter ( Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean. Adult sea otters typically weigh between 14 and 45 kg (30 and 100 lb), making them the heaviest members of the weasel family, but among [3] the smallest marine mammals. Unlike most marine mammals, the sea otter's primary form ...
22 hours ago · Lucy", the first Australopithecus afarensis skeleton found. Lucy was only 1.06 m (3 ft 6 in) tall. Humans evolved in Africa from great apes through the lineage of hominins, which arose 7–5 million years ago and includes chimpanzees and bonobos.
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22 hours ago · Cephalopods are thought to be unable to live in fresh water due to multiple biochemical constraints, and in their >400 million year existence have never ventured into fully freshwater habitats. Cephalopods occupy most of the depth of the ocean, from the abyssal plains to the sea surface, and have also been found in the hadal zone.
22 hours ago · Schlesinger, 1917. A mastodon ( mastós 'breast' + odoús 'tooth') is a member of the genus Mammut (German for "mammoth"), which strictly defined, was endemic to North America and lived from the late Miocene to the early Holocene. Mastodons belong to the order Proboscidea, the same order as elephants and mammoths (which belong to the family ...
22 hours ago · Tremarctinae (Short-faced bears) Ursinae (All other bear species) Bears are carnivoran mammals of the family Ursidae ( / ˈɜːrsɪdiː, - daɪ / ). They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats throughout most of the ...
22 hours ago · Spinosauridae (or spinosaurids) is a clade or family of tetanuran theropod dinosaurs comprising ten to seventeen known genera. Spinosaurid fossils have been recovered worldwide, including Africa, Europe, South America and Asia. Their remains have generally been attributed to the Early to Mid Cretaceous . Spinosaurids were large bipedal carnivores.
22 hours ago · PCBs are organochlorine compounds with the formula C 12 H 10−x Cl x; they were once widely used in the manufacture of carbonless copy paper, as heat transfer fluids, and as dielectric and coolant fluids for electrical equipment. [2] Because of their longevity, PCBs are still widely in use, even though their manufacture has declined ...
