For a long time, human progress has been seen largely in terms of the technology of the era, as can be seen in the way we divide the past into ‘ages’. Most of what constitutes archaeological records is made up of man-made objects. ‘Technology’ looks at the ‘Palaeolithic’ technology, or ‘Old Stone Age’, which encompasses over 99% of the archaeological record from 2.5 million to 10,000 years ago. Archaeology is sometimes regarded as a luxury, but it can be very useful and have practical implications. Human remains may yield useful information on the history of diseases or pathologies.