fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Its latin term is 'fossilis' that means "Obtained by digging." Bones, shells, exoskeleton, stone imprints of animal or microbes, hair, petrified wood, oil, coal, and DNA remnants etc are all example of fossils. Fossils may also consist of the marks left behind by the organism while it was alive, such as animal tracks or faeces (coprolites). These types of fossil are called trace fossils or ichnofossils, as opposed to body fossils. Specimens are usually considered to be fossils if they are over 10,000 years old. Now we have an example of the oldest fossils which is around 3.48 to 4.1billion years old.

The study of fossils is called 'Paleontology'. Fossils can be fun to collect and interesting to study for the amateur, but they also tell geologists about the history of the world and how it was formed. The best time to look for fossils is after a heavy rain, when pieces of shell and fossils may be exposed in the soil.
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