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The second lesson, Radioactive Decay: A Sweet Simulation of Half-life, introduces the idea of half-life.

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The extent of documentation varied considerably in 'historical' cultures and the information that survives is determined by a variety of factors.

If a context containing burnt debris and broken artefacts is excavated on a site from a historical period, it is tempting to search the local historical framework for references to warfare or a disaster in the region, and to date the excavated context accordingly.

However, some archaeologists and textual scholars have raised questions about the provenance of the text, and have suggested that since it was not found in a supervised excavation, it may be a forgery.It must be made clear at the outset that typology is not, strictly speaking, a dating method, but a means of placing artefacts into some kind of order.Classification divides things up for the purposes of description, whereas typology seeks to identify and analyse changes that will allow artefacts to be placed into sequences.Judea was known as one of the centers of glass manufacturing in the Roman world.Archaeologists excavated the remains of a glass production facility at the foot of Mt.Braila features one of Romania's oldest electrical tramlines. Where: 15 miles (25 km) east of Braila Access: car (on DN22 D)