Jupiterimages/Polka Dot/Getty Images. The term CT scan stands for Computed Axial Tomography and is often referred to as a CAT scan. It is a noninvasive test that helps doctors diagnose medical conditions. The procedure can take anywhere from 15 minutes to one hour depending on the part of the body being scanned.
Hence, we suggest that the Anthropocene (formal or informal) be defined to begin historically at the moment of detonation of the Trinity A-bomb at Alamogordo, New Mexico, at 05:29:21 Mountain War Time (Â± 2 s) July 16, 1945 (= 11:29:21 Co-ordinated Universal Time = Greenwich Mean Time).ere, we evaluate when the Anthropocene might be considered to have begun, as sufficient relevant studies have already been published (notably, those concerned with stratigraphic examination of the Anthropocene in Waters et al., 2014a) for interim assessment of this question.
The Two Epochs. The Quaternary Period can be divided into two major epochs; the Pleistocene and the Holocene.. The Pleistocene epoch started 1.8 million years ago and ended around 11,000 years ago, while the Holocene started 11,000 years ago and still continues today.cientists refer to the era as the Age of Humans, the time was when hominids gained a foothold on earth. All of the plants and animals that we see today are part of the Quaternary Period; however, there are also extinct animals and plants that lived on the earth during its early stages.