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2. Geologic time scale - Wikipedia

   en.wikipedia.org/wiki/Geologic_time_scale

   The numeric values on the International Chronostratigrahpic Chart are represented by the unit Ma (megaannum, for 'million years'). For example, 201.4 ± 0.2 Ma, the lower boundary of the Jurassic Period, is defined as 201,400,000 years old with an uncertainty of 200,000 years.

3. Geologic temperature record - Wikipedia

   en.wikipedia.org/wiki/Geologic_temperature_record

   The geologic temperature record are changes in Earth's environment as determined from geologic evidence on multi-million to billion (10 9) year time scales. The study of past temperatures provides an important paleoenvironmental insight because it is a component of the climate and oceanography of the time.

4. Positional notation - Wikipedia

   en.wikipedia.org/wiki/Positional_notation

   Positional numeral systems work using exponentiation of the base. A digit's value is the digit multiplied by the value of its place. Place values are the number of the base raised to the nth power, where n is the number of other digits between a given digit and the radix point.

5. Timeline of the evolutionary history of life - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_the...

   The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.

6. Free Online Games: Play board games, card games, casino ... - AOL

   www.aol.com/games

   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

7. AOL Video - Serving the best video content from AOL and ...

   www.aol.com/video

   The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.

8. Geological history of Earth - Wikipedia

   en.wikipedia.org/wiki/Geological_history_of_Earth

   The Earth's magnetic field was established 3.5 billion years ago. The solar wind flux was about 100 times the value of the modern Sun, so the presence of the magnetic field helped prevent the planet's atmosphere from being stripped away, which is what probably happened to the atmosphere of Mars.

9. The Scale of the Universe - Wikipedia

   en.wikipedia.org/wiki/The_Scale_of_the_Universe

   10 million light years 10 22 meters Fornax Cluster — 20 million light years 2 × 10 23 meters Virgo Cluster: 1.55 × 10 23 meters 30 million light years 3 × 10 23 meters Yottameter: 10 24 meters 10 24 meters Virgo Supercluster: 1.5 × 10 24 meters 110 million light years 1.1 × 10 24 meters Distance to the Great Attractor — 250 million ...