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The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [ 5] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...
University of Arizona Biosphere 2 is an American Earth system science research facility located in Oracle, Arizona. Its mission is to serve as a center for research, outreach, teaching, and lifelong learning about Earth, its living systems, and its place in the universe. [ 1] It is a 3.14-acre (1.27-hectare) [ 2] structure originally built to ...
Image credits: Cosimia1964 #2. My mom was dying. A friend told me "you have your whole life to freak out about this-- *don't do it in front of her.* "It really helped me to understand that my ...
Stars are known to get brighter as they age, and the Sun has become 30% brighter since its formation 4.5 billion years ago. [70] Many models indicate that the early Earth should have been covered in ice. [71] [66] A likely solution is that there was enough carbon dioxide and methane to produce a greenhouse effect. The carbon dioxide would have ...
Carvings on a 12,000-year-old monument in Turkey appear to mark solar days and years, making it possibly the oldest solar calendar in ancient civilization. Marking a massive comet strike as the ...
The global temperature averaged over the past year is more than 1.5 degrees Celsius (2.7 degrees Fahrenheit) higher than pre-industrial times, seeming to exceed the global agreed upon limit for ...
The Geologic Calendar is a scale in which the geological timespan of the Earth is mapped onto a calendrical year; that is to say, the day one of the Earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. [1] On this calendar, the inferred appearance of the first living single-celled ...
Map of ongoing armed conflicts (number of combat-related deaths in current or previous year): Major wars (10,000 or more) Wars (1,000–9,999) Minor conflicts (100–999) Skirmishes and clashes (1–99) The following is a list of ongoing armed conflicts that are taking place around the world.