The answer depends on the earliest measurements of WHAT: time, distance, mass/weight, ...
Stone
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Weights and measures were among the earliest tools invented by man.
A subjective measurement is something that is based on an opinion and is most often biased. The opposite would be an objective measurement which is quantifiable and based only on fact.
A cubit is an ancient unit of measurement based on the length of the forearm from the elbow to the tip of the middle finger, typically measuring about 18 inches (46 centimeters). It was used in various cultures, including the Egyptians and Hebrews, primarily for construction and land measurement. There are different types of cubits, such as the common cubit and the royal cubit, which can vary slightly in length. The cubit is often considered one of the earliest forms of standardized measurement.
It's a unit of measurement. It's not based on anything.
It's hard to say but the earliest signs of whaling activity would be as earliest as 6000BC based on archaeological finds.
it was the angelometer which was used at first to emasure angles :) ... hope that help u much :D
Of seduction.
The earliest classification systems grouped organisms based on observable physical features, such as morphology and anatomy. This system organized living things into categories based on similarities in structure and behavior.
The metric system.
The metric system.