How an ancient life form morphed into the version we see today requires a lot of deductions and guesswork. Fossil records are helpful, but they are not always easy to find. However, in a lucky break for palaeontologists, an ancient starfish fossil has been uncovered that might be the "missing link" they had been searching for a long time. The starfish fossil was uncovered in Morocco. The newly discovered fossil is now being recognised as the oldest known starfish on the planet.
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How Do Archaeologists Count Backward Using BP?
Chronological dating , or simply dating , is the process of attributing to an object or event a date in the past, allowing such object or event to be located in a previously established chronology. This usually requires what is commonly known as a "dating method". Several dating methods exist, depending on different criteria and techniques, and some very well known examples of disciplines using such techniques are, for example, history , archaeology , geology , paleontology , astronomy and even forensic science , since in the latter it is sometimes necessary to investigate the moment in the past during which the death of a cadaver occurred. Dating methods are most commonly classified following two criteria: relative dating and absolute dating. Relative dating methods are unable to determine the absolute age of an object or event, but can determine the impossibility of a particular event happening before or after another event of which the absolute date is well known. In this relative dating method, Latin terms ante quem and post quem are usually used to indicate both the most recent and the oldest possible moments when an event occurred or an artifact was left in a stratum , respectively.
BP: How Do Archaeologists Count Backward Into the Past?
On a more positive note, when you meet someone new, the internet allows you to verify whether people are who they claim to be. You can Google that person, find photos, articles or do background checks on them. As you can see there have been many changes, some good and some not so good.