Achelousaurus

Achelousaurus.
Achelousaurus was a ceratopsid dinosaur that lived about 74.2 million years ago, during the Late Cretaceous. The first fossils of the genus were collected from the Two Medicine Formation in the U.S. state of Montana in 1987. Mainly known from skull material, Achelousaurus was about 6 m (20 ft) long, with a weight of about 3 tonnes (3.3 short tons). It had a large head with a hooked beak, and a bony neck-frill with a pair of long, curved spikes. In the places where other centrosaurines often had horns, Achelousaurus had bosses (roundish protuberances) above the eyes and on the snout that may have been used in fights and for display. It has been suggested that Achelousaurus was a transitional form between Einiosaurus (which had spikes but no bosses) and Pachyrhinosaurus (which had larger bosses), though this is debated. As a ceratopsian, Achelousaurus would have been a herbivore. It appears to have had a high metabolic rate, though lower than that of modern mammals and birds.

picture of the day

https://ift.tt/3p9Xc3t

Mount Takahe

Mount Takahe.
Mount Takahe is a 3,460-metre-high (11,350 ft) snow-covered shield volcano in Marie Byrd Land, Antarctica, 200 kilometres (120 mi) from the Amundsen Sea. It is about 30 kilometres (20 mi) wide with parasitic vents and a caldera up to 8 kilometres (5 mi) wide. Most of the volcano was formed by trachytic lava flows. It reached its present height about 200,000 years ago. Snow, ice, and glaciers cover most of Mount Takahe. With a volume of 780 km3 (200 cu mi), it is a massive volcano; the parts of the edifice that are buried underneath the West Antarctic Ice Sheet are probably even larger. It is part of the West Antarctic Rift System along with eighteen other known volcanoes. A major eruption took place around 17,700 years ago, possibly forming an ozone hole over Antarctica. The last eruption occurred about 7,600 years ago; there is no present-day activity. The name of the volcano refers to the takahē, a flightless bird from New Zealand.

picture of the day

https://ift.tt/38gtraa

Interstate 296

Interstate 296.
Interstate 296 (I-296) is a part of the Interstate Highway System in the US state of Michigan. It is a state trunkline highway that runs for 3.43 miles (5.52 km) parallel to the Grand River on the west bank, entirely within the Grand Rapids area. Its termini are I-196 near downtown Grand Rapids and I-96 on the north side of Grand Rapids in Walker. For most of its length, the Interstate runs concurrently with US Highway 131, which continues as a freeway built to Interstate Highway standards north and south of the shorter I-296. The highway was first proposed in the late 1950s and opened in December 1962. The Michigan Department of Transportation has since eliminated all signage for I-296 and removed the designation from their official state map, leaving it unsigned, but I-296 is still listed on the Interstate Highway System route log maintained by the Federal Highway Administration.

picture of the day

https://ift.tt/3nw7ZV6

Banksia serrata

Banksia serrata.
Banksia serrata, the old man banksia, is a species of woody shrub or tree in the family Proteaceae. It is found from Queensland to Victoria, commonly growing as a gnarled tree up to 16 m (50 ft) in height, though it can be much smaller in more exposed areas. It has wrinkled grey bark and shiny dark green serrated leaves. The large yellow or greyish-yellow flower spikes turn grey as they age, and pollinated flowers develop into large, grey, woody seed pods. This Banksia species is one of four collected by Joseph Banks in 1770, and one of four published in 1782 as part of Carl Linnaeus the Younger's original description of the genus. Throughout its range, it grows exclusively in sandy soils, and is usually the dominant plant where it grows in scrubland or low woodland. B. serrata is pollinated by and provides food for a wide array of vertebrate and invertebrate animals in the autumn and winter months. It is a common plant of parks and gardens.