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Information Timeline Graphic by adstarkel. Used under CC BY-NC-SA 2.0
When an event first happens, there is not a lot of information about it because information takes time to create. As your event recedes into the past, there has been time for more accurate and in-depth information to have been created. If you are not finding information on your event, consider where your event is in this timeline. Has there been enough time for a scholarly article to have been written about your event?