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Among ocean-going birds in general, the upperside tends to be much darker than the underside (including the underwings) – though some petrels are dark grey all over, a combination of more or less dark grey upperside and white underside and (usually) head is a widespread colouration found in seabirds and may either be plesiomorphic for "higher ...
A 69-million-year-old skull found in Antarctica belonged to what scientists say is the oldest known modern bird.. An early relative of the continent’s ducks and geese, it lived off the Antarctic ...
The animals inhabiting Antarctica at this time would still have had to endure long periods of darkness during the winter, much like in modern-day Antarctica. [18] Despite being found in marine sediment, Antarctopelta, like all ankylosaurs, lived on land. Other ankylosaurs have also been found in marine sediments, likely as a result of carcasses ...
The genus was one of the first Mesozoic marine reptiles known to science—the first fossils of Mosasaurus were found as skulls in a chalk quarry near the Dutch city of Maastricht in the late 18th century, and were initially thought to be crocodiles or whales. One skull discovered around 1780 was famously nicknamed the "great animal of Maastricht".
Image of James Ross Island, where Trinisaura's fossils were discovered. Fossils of Trinisaura were first collected in 2008 by Juan Moly and Rodolfo Coria, members of the Antarctic Summer Campaign that had been mounted by Instituto Antártico Argentino to the fossilferous exposures of the Santa Marta Cove on James Ross Island, Antarctica.
Later in the century, at a site near the small town of Vyazniki in western Russia, many more Dvinosaurus specimens were identified and analyzed by B.P. Vjuschkov and Mikhail Shishkin, who classified two new species of Dvinosaurus and added to the depiction of the genus as whole in the process. What follows is a summary and general description ...
Brontotheriidae is a family of extinct mammals belonging to the order Perissodactyla, the order that includes horses, rhinoceroses, and tapirs.Superficially, they looked rather like rhinos with some developing bony nose horns, and were some of the earliest mammals to have evolved large body sizes of several tonnes.
Subsequently, this gives the rostrum its characteristic short and round appearance, in contrast to the elongated skulls found in other cetaceans. Related to this the type species O. peruvianus is thought to have lacked a melon (an important sensory organ), or at the least only had a vestigial melon.