While it has been known since Jane Goodall's 1960s discovery that modern chimpanzees use tools, research published in 2007 indicates that chimpanzee stone tool use dates to at least 4, 300 years ago.

Between 400, 000 years ago and the second interglacial period in the Middle Pleistocene, around 250, 000 years ago, the trend in skull expansion and the elaboration of stone tool technologies developed, providing evidence for a transition from H. erectus to H. sapiens.

" A sharp rock ", an Oldowan pebble tool, the most basic of human stone tools

The brain later grew in size, and H. erectus eventually developed a more complex stone tool technology called the Acheulean.

A microlith is a small stone tool usually made of flint or chert and typically a centimetre or so in length and half a centimetre wide.

Geometric microliths are a clearly defined type of stone tool, at least in their basic forms.

Archaeological sites in Yemen and Oman have yielded a stone tool style that is distinct from the East African tradition.

* Lithic reduction, in Stone Age toolmaking, to detach lithic flakes from a lump of tool stone

Discovered by an international team led by Shannon McPherron, they are the oldest evidence of stone tool use ever found anywhere in the world.

:"... the earliest stone tool makers were skilled flintknappers ....

A variety of stone tool sIn addition to lithic analysis, the field prehistorian utilizes a wide range of techniques derived from multiple fields.

In the 1920s, South African archaeologists organizing the stone tool collections of that country observed that they did not fit the newly detailed Three-Age System.

Prehistoric stone tool s over 10, 000 years old, found in Les Combarelles cave, France

One of the earliest distinguishable stone tool forms is the hand axe.

His use of l ' industrie foreshadows the 20th century " industries ," but where the moderns mean specific tool traditions, Mahudel meant only the art of working stone and metal in general.

* Celt ( tool ), a type of stone tool

When expertly " cut " by striking with a specialized tool in the quarry, many slates will form smooth flat sheets of stone which have long been used for roofing and floor tiles and other purposes.

Such bell pits may also mark the sites of ancient flint mines, where the prime object was to remove flint nodules for stone tool manufacture.

Prior to the establishment of the missions, the native peoples knew only how to utilize bone, seashells, stone, and wood for building, tool making, weapons, and so forth.

With respect to the tool or object used to induce the crystal-gazer's trance, this can be achieved with any shiny object, including a crystalline gem stone or a convex mirror — but in common practice, a crystal ball is most often used.

The table facet is then used to attach the stone into a dop ( a lapidary tool holding gemstones for cutting or polishing ).

A chisel is a tool with a characteristically shaped cutting edge ( such that wood chisels have lent part of their name to a particular grind ) of blade on its end, for carving or cutting a hard material such as wood, stone, or metal.

In archaeology, a hammerstone is a hard cobble used to strike off lithic flakes from a lump of tool stone during the process of lithic reduction.

The hammerstone is a rather universal stone tool which appeared early in most regions of the world including Europe, India and North America.

The place is inhabited by several hundred warlike women who are anachronisms of the Twentieth Century -- stone age amazons who live in an all-female, matriarchal society which is self-sufficient ''.

Here, on the hottest day, it is cool beneath the stone and fresh from the water flowing in the sluices at the bottom of the vaults.

Behind him lay the Low Countries, where men were still completing the cathedrals that a later Florentine would describe as `` a malediction of little tabernacles, one on top of the other, with so many pyramids and spires and leaves that it is a wonder they stand up at all, for they look as though they were made of paper instead of stone or marble '' ; ;

Thus a man who is butting a stone wall at the office may become unusually aggressive in bed -- the one place he can still be champion.

`` The white colonnaded, cedar-roofed Southern mansion is directly traceable via the grey and buff stone of grey-skied England to the golden stucco of one particular part of the blue South, the Palladian orbit stretching out from Vicenza: the old mind of Andrea Palladio still smiles from behind many an old rocking chair on a Southern porch, the deep friezes of his architectonic music rise firm above the shallower freeze in the kitchen, his feeling for light and shade brings a glitter from a tall mint julep, his sense of columns framing the warm velvet night has brought together a million couple of mating lips ''.

The connection with Dorians and their initiation festival apellai is reinforced by the month Apellaios in northwest Greek calendars, but it can explain only the Doric type of the name, which is connected with the Ancient Macedonian word " pella " ( Pella ), stone.

The male Colostethus subpunctatus, a tiny frog, protects his egg cluster which is hidden under a stone or log.

Its usage is mostly restricted to engravings on stone and jewelry, although inscriptions have also been found on bone and wood.

Related to this is lexicostatistics, which attempts to determine the degree of relation between a set of languages by comparing the percentage of basic vocabulary ( words like " I ", " you ", " heart ", " stone ", " two ", " be ", " and ") they share in common.

Kierkegaard's concept of angst is considered to be an important stepping stone for 20th-century existentialism.

The Ancient Pueblo culture is perhaps best known for the stone and adobe dwellings built along cliff walls, particularly during the Pueblo II and Pueblo III eras.

New sectors, such as precious stone processing and jewelry making and communication technologyArmentel ( left fromt the USSR era ), which is not even owned by the government or Armenian investors.

At the cemetery in what is now the district of Pullach stood a memorial stone which was mentioned as recently as 1967, but which is no longer at the site.

The ground floor, in particular, is rather astonishing with tracery, irregular oval windows and flowing sculpted stone work.

In front of the large windows, as if they were pillars that support the complex stone structure, there are six fine columns that seem to simulate the bones of a limb, with an apparent central articulation ; in fact, this is a floral decoration.

It is usually just a large block of concrete or stone at the end of the chain.

Often, the fact that sometimes only a thin surface layer of violet color is present in the stone or that the color is not homogeneous makes for a difficult cutting.

Ambergris is less dense than water and floats, whereas amber is less dense than stone, but too dense to float.

Pliny is presenting an archaic view, as in his time amber was a precious stone brought from the Baltic at great expense, but the Germans, he says, use it for firewood, according to Pytheas.

* 1248 – The foundation stone of Cologne Cathedral, built to house the relics of the Three Wise Men, is laid.