Synapsid

Synapsids (Greek, 'fused arch'), synonymous with theropsids (Greek, 'beast-face'), are a group of animals that includes mammals and every animal more closely related to mammals than to other living amniotes. They are easily separated from other amniotes by having a temporal fenestra, an opening low in the skull roof behind each eye, leaving a bony arch beneath each; this accounts for their name. Primitive synapsids are usually called pelycosaurs or pelycosaur-grade synapsids; more advanced mammal-like ones, therapsids. The non-mammalian members are described as mammal-like reptiles in classical systematics; they can also be called stem mammals or proto-mammals. Synapsids evolved from basal amniotes and are one of the two major groups of the later amniotes; the other is the sauropsids, a group that includes modern reptiles and birds. The distinctive temporal fenestra developed in the ancestral synapsid about 312 million years ago, during the Late Carboniferous period.

Mammal

Mammals (class Mammalia /məˈmeɪli.ə/ from Latin mamma "breast") are any members of a clade of endothermic amniotes distinguished from reptiles and birds by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands. The mammalian brain regulates body temperature and the circulatory system, including the four-chambered heart.

Mammals include the largest animals on the planet, the rorquals and other large whales, as well as some of the most intelligent, such as elephants, primates, including humans, and cetaceans. The basic body type is a four-legged land-borne animal, but some mammals are adapted for life at sea, in the air, in trees, or on two legs. The largest group of mammals, the placentals, have a placenta, which enables feeding the fetus during gestation. Mammals range in size from the 30–40 mm (1.2–1.6 in) bumblebee bat to the 33-meter (108 ft) blue whale.

The word "mammal" is modern, from the scientific name Mammalia coined by Carl Linnaeus in 1758, derived from the Latin mamma ("teat, pap"). All female mammals nurse their young with milk, which is secreted from special glands, the mammary glands. According to Mammal Species of the World, 5,416 species were known in 2006. These were grouped in 1,229 genera, 153 families and 29 orders. In 2008 the IUCN completed a five-year, 1,700-scientist Global Mammal Assessment for its IUCN Red List, which counted 5,488 accepted species.

Mammal (film)

Mammal is a 2016 internationally co-produced drama film directed by Rebecca Daly. It was shown in the World Cinema Dramatic Competition section at the 2016 Sundance Film Festival.

Cast

References

External links

Mammal (EP)

Mammal is the self-titled debut Extended play (EP), by Australian hard rock band, Mammal from 2006. The band sold the EP independently at their live shows and on their website until early 2007 when they signed with Metropolitan Groove Merchants (MGM) to distribute it independently. The original version (no longer in print) was replaced by the MGM version, released in March. The EP peaked into the top 20 of the AIR Charts.

Background

Mammal formed in Melbourne, Australia in March 2006 when vocalist Ezekiel Ox (ex-Full Scale Deflection, Full Scale) joined guitarist Pete Williamson (ex-Pete Murray & the Stonemasons) who was writing songs with session bass guitarist, Nick Adams; the trio were joined by drummer, Zane Rosanoski. In mid-2006 they entered the Sing Sing Studios to record their self-titled debut five-track Extended Play (EP), Mammal, which was sold independently at their live shows and on their website. By early 2007, they signed with Metropolitan Groove Merchants (MGM) which distributed their EP from March, which peaked into the top 20 of the AIR Charts.

Stem

Stem may refer to:

Stem (ship)

The stem is the most forward part of a boat or ship's bow and is an extension of the keel itself. The stem is the curved edge stretching from the keel below, up to the gunwale of the boat. The stem is often found on wooden boats or ships, but not exclusively. The stem is part of the physical structure of a wooden boat or ship that gives it strength at the critical section of the structure, bringing together the port and starboard side planks of the hull.

Styles

There are two styles of stems: plumb and raked. When the stem comes up from the water, if it is perpendicular to the waterline it is "plumb." If it is inclined at an angle to the waterline it is "raked." (E.g., "The hull is single decked and characterized by a plumb stem, full bows, straight keel, moderate deadrise, and an easy turn of bilge.")

Stemhead

Because the stem is very sturdy, the top end of it may have something attached, either ornamental or functional in nature. On smaller vessels, this might be a simple wood carving (ornamental) or cleat (functional). On large wooden ships, figureheads can be attached to the upper end of the stem.

Stem (bicycle part)

The stem is the component on a bicycle that connects the handlebars to the steerer tube of the bicycle fork. Sometimes called a goose neck, a stem's design belongs to either a quill or threadless system, and each system is compatible with respective headset and fork designs:

Quill versus threadless

Somewhat counterintuitively, the term threadless derives not from whether the stem itself is threaded, but from whether a headset lock nut threads onto the fork steer tube. Quill stems require a threaded headset of specific length for each bicycle model. Threadless stems require an unthreaded steerer tube, which may vary in length for each bicycle model.

Quill systems predate threadless systems. With the advent of threadless stems, manufacturers no longer need to provide a range of threaded forks for a given model; all threadless system forks are made with the same length steerer tube (long). The steerer tubes are then cut to length to fit upon installation. Unthreaded forks often require less labor to swap than threaded forks.