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09-Jul-2019 12:58

As a rule, to be considered a living fossil, the fossil species must be old relative to the time of origin of the extant clade. It has been defined as "short-term (hours or days to kyrs) locally, regionally, or interregionally pervasive changes in the ecological, biogeographical, and/or evolutionary character of biotas that are isochronous or nearly so throughout their range".Bioevents either relate to diversification of a particular fossil group or a reduction, these may equate to speciation events or extinction events, or may only represent migration.The Scale of the Universe from Big to Small (youtube) The Scale of the Universe from Small to Big (youtube) NASA Astronomy Picture of the Day (APOD) The Scale of the Universe - Interactive (manual control scale) Sizes (nano) Stars and Galaxies started to form.Reionization marks the point at which the hydrogen in the Universe became ionized.Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ion is an Atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.This chert, formed in volcanic hot springs, preserved several species of early plants in cellular detail by petrification.Paleozoic Timeline of Plant Evolution (wiki) - Photosynthesis Horseshoe Crab Living Fossil is an extant taxon that closely resembles organisms otherwise known only from the fossil record. Carboniferous is a geologic period and system that spans 60 million years from the end of the Devonian Period 358.9 million years ago (Mya), to the beginning of the Permian Period, 298.9 Mya. Hangenberg Event is a bioevent that occurred at the end of the Famennian epoch (late Devonian) associated with the Late Devonian extinction (roughly 358.9 ± 0.4 million years ago); Bioevent is an event recognised in a sequence of sedimentary rocks, where there is a significant change in the biota as recorded by assemblages of fossils over a relatively short period of time.

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And as you got closer, it would almost disappear because of the tremendous amount of space there is between everything, like with atoms.

Almost all the present phyla plants (Asterids - Verbena) appeared during this period, with the exception of Bryozoa, which are a phylum of aquatic invertebrate animals who made its earliest known appearance later, in the Lower Ordovician. First land plants occurs in the Ordovician, in the form of fossil spores.

Land plants began to diversify in the Late Silurian, from around 430 million years ago, and the results of their diversification are displayed in remarkable detail in an early Devonian fossil assemblage from the Rhynie chert.

Marine Biology , in the late Proterozoic, oxygen levels in the oceans and atmosphere increased dramatically.

By 600 million years ago, the oxygen in the atmosphere reached about one-fifth of today’s level (21 percent).(3.9 Billion Years since the Birth of Earth, and 2.9 Billion Years since Microorganisms Formed)The earth was completely covered in Ice.



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