Both the start and end of the period are marked by major extinction events.Earth had 1 Continent, mostly desert, no broad leaf trees, no flowers, Earth spun faster, moon was closer.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.Gondwana is the name given to an ancient supercontinent.
With the exception of some ectothermic species like the leatherback sea turtle and crocodiles, no tetrapods weighing more than 25 kilograms (55 lb) survived.Pangaea started braking apart about 200 million years ago.G Plates Earth Byte India broke away from the other fragments of Gondwana and began moving north.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).
Its largest city is Kansas City which is a major railroad hub and a large center for freight.
The Spirella Building, completed in 1920, blends in despite its central position through being disguised as a large country house, complete with towers and a ballroom.
“Do you realize that what you teach is more critical than Wayne Dyer by orders of magnitude to benefit human intelligence?
There are two main variants of PZP beside the standard variant, "Borderline Petting Zoo People", and "Borderline Little Bit Beastly".