300

Year 300 (CCC) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Valerius (or, less frequently, year 1053 Ab urbe condita). The denomination 300 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

By place

Roman Empire

Asia

Circa

Circa (from Latin, meaning "around, about"), usually abbreviated c., ca or ca. (also circ. or cca.), means "approximately" in several European languages including English, usually in reference to a date.Circa is widely used in genealogy and historical writing when the dates of events are not accurately known. When used in date ranges, circa is applied before each approximate date, while dates without circa immediately preceding them are generally assumed to be known with certainty. For example:

See also

References

External links

The dictionary definition of circa at Wiktionary

Media related to Circa at Wikimedia Commons

Jebel Irhoud

Jebel Irhoud (Arabic: جبل إيغود‎) is an archaeological cave site located near Sidi Moktar, about 100 km west of Marrakesh, Morocco. Since c. 1991, seven significant hominid fossils have been discovered. These skeletal remains have been radiocarbon dated to around 160,000 years ago. The fossils include portions of two adult skulls (Irhoud 1 and Irhoud 2), a child’s mandible (Irhoud 3), and a child’s humerus (Irhoud 4).

The significance of the original discoveries of the Irhoud 1, 2 and 3 fossils (which were found during quarrying for Barytes) was not fully understood until 2007, as they were initially considered to be North African Neandertals. They are now grouped with other early anatomically modern humans such as Qafzeh and Es Skhul in Israel.

In 2007, the Max Planck Institute announced that Synchrotron analysis of a tooth from the Irhoud 3 child's mandible revealed that 'long childhood' and consequent brain and social development was a key element in the earliest Homo sapiens.

Homo sapiens

Homo sapiens (Latin: "wise person") is the binomial nomenclature (also known as the scientific name) for the only extant human species. Homo is the human genus, which also includes Neanderthals and many other extinct species of hominid; H. sapiens is the only surviving species of the genus Homo. Modern humans are the subspecies Homo sapiens sapiens, which differentiates them from what has been argued to be their direct ancestor, Homo sapiens idaltu. The ingenuity and adaptability of Homo sapiens has led to its becoming, arguably, the most influential species on the planet; it is currently deemed of least concern on the Red List of endangered species by the International Union for the Conservation of Nature.

Name and taxonomy

The binomial name Homo sapiens was coined by Carl Linnaeus (1758). The Latin noun homō (genitive hominis) means "man, human being".

Subspecies of H. sapiens include Homo sapiens idaltu and the only extant subspecies, Homo sapiens sapiens. Some sources show Neanderthals (Homo neanderthalensis) as a subspecies (Homo sapiens neanderthalensis). Similarly, the discovered specimens of the Homo rhodesiensis species have been classified by some as a subspecies (Homo sapiens rhodesiensis), but these last two subspecies classifications are not widely accepted by scientists.