when was this land discovered?
15th century probably
Terra Australis
Explorers of the Age of Discovery, from the late 15th century on, proved that Africa was almost entirely surrounded by sea, and that the Indian Ocean was accessible from both west and east. These discoveries reduced the area where the continent could be found; however, many cartographers held to Aristotle's opinion. Scientists such as Gerardus Mercator (1569) and Alexander Dalrymple as late as 1767 argued for its existence, with such arguments as that there should be a large landmass in the south as a counterweight to the known landmasses in the Northern Hemisphere. As new lands were discovered, they were often assumed to be parts of the hypothetical continent.
what class of vertebrates do seals belong to Pinnipeds what are pinnipeds? Diverse clade of carnivorous, fin-footed, semiaquatic marine mammals. what is the diet of the the last kind of mammal you mentioned? All cetaceans are carnivorous and predatory what kind of threat do these mammals face? Due to the difficulty to survey populations, 38% of marine mammals are data deficient apart from the seal can you name some other animals that full under this type of mammals? Whales, manatees, sea otters and polar bears how do pinniped move from one place to another? They have two pairs of flippers; the fore-flippers and hind-flippers, and smooth networks of muscle bundles in their skin that may increase laminar flow and make it easier for them to slip through water do they sleep? Yes, sleep in water with half of their brain awake where are these mammals mostly found? North Atlantic, the North Pacific and the Southern Ocean is there an unknown land in the last ocean you mentioned? Yes, "Terra Australis"
wiki:11584045
Terra Australis [SEP] 16th century
Explorers of the Age of Discovery, from the late 15th century on, proved that Africa was almost entirely surrounded by sea, and that the Indian Ocean was accessible from both west and east. These discoveries reduced the area where the continent could be found; however, many cartographers held to Aristotle's opinion. Scientists such as Gerardus Mercator (1569) and Alexander Dalrymple as late as 1767 argued for its existence, with such arguments as that there should be a large landmass in the south as a counterweight to the known landmasses in the Northern Hemisphere. As new lands were discovered, they were often assumed to be parts of the hypothetical continent.