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Agua Tibia Wilderness (ATW) is a 17,961-acre (72.69 km 2) protected area in Riverside and San Diego counties, in the U.S. state of California. It is mostly within the Palomar Ranger District of the Cleveland National Forest . [ 3 ]
During the early Paleozoic, Colorado was covered by a warm shallow sea that would come to be home to creatures like brachiopods, conodonts, ostracoderms, sharks and trilobites. This sea withdrew from the state between the Silurian and early Devonian leaving a gap in the local rock record. It returned during the Carboniferous.
Animal navigation is the ability of many animals to find their way accurately without maps or instruments. Birds such as the Arctic tern , insects such as the monarch butterfly and fish such as the salmon regularly migrate thousands of miles to and from their breeding grounds, [ 1 ] and many other species navigate effectively over shorter ...
This name at the time was an invalid nomen nudum and was only published by Koenig in 1825, [16] but was adopted by De la Beche in 1819 in a lecture where he named three Ichthyosaurus species. This text would only be published in 1822, just after De la Beche's friend William Conybeare published a description of these species, together with a ...
The tibia had a developed tuberosity and was expanded at the lower end. The astragalus bone (ankle bone) was separated from the tibia and the calcaneum, and formed half of the socket for the fibula. It had long, stout feet with three well-developed toes that bore large claws, which were much less curved than those of the hand.
The tibia of Ohmdenosaurus shows two excavations caused by weathering that are 2–5 cm (0.8–2.0 in) deep. These excavations are located on the sidewards projecting upper and lower ends, but only on the medial (inner) side of the bone.
A year after returning to Earth, the astronauts on average exhibited 2.1% reduced bone mineral density of the tibia - one of the bones of the lower leg - and 1.3% reduced bone strength.
With the circumference of the Earth being approximately 40,000 km (24,855 mi), the maximum distance that can be displayed on an azimuthal equidistant projection map is half the circumference, or about 20,000 km (12,427 mi). For distances less than 10,000 km (6,214 mi) distortions are minimal.