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  2. String girdling Earth - Wikipedia

    en.wikipedia.org/wiki/String_girdling_Earth

    String girdling Earth is a mathematical puzzle with a counterintuitive solution. In a version of this puzzle, string is tightly wrapped around the equator of a perfectly spherical Earth. If the string should be raised 1 metre (3 ft 3 in) off the ground, all the way along the equator, how much longer would the string be?

  3. List of unsolved problems in geoscience - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Was there ever a collision of the Earth with another planet Theia, giving birth to the Moon? [1] There is compelling evidence, such as measures of a shorter duration of the Earth's rotation and lunar month in the past, pointing to a Moon much closer to Earth during the early stages of the Solar System. [2] What is the long-term heat balance of ...

  4. Earth science - Wikipedia

    en.wikipedia.org/wiki/Earth_science

    Earth science or geoscience includes all fields of natural science related to the planet Earth. [1] This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).

  5. Off the Grid: Sally breaks down USA TODAY's daily ... - AOL

    www.aol.com/off-grid-sally-breaks-down-060019463...

    Explore daily insights on the USA TODAY crossword puzzle by Sally Hoelscher. Uncover expert takes and answers in our crossword blog. ... Science & Tech. Sports. Weather. ... Earth's largest desert ...

  6. Portal:Earth sciences - Wikipedia

    en.wikipedia.org/wiki/Portal:Earth_sciences

    Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).

  7. Lifeless Planet - Wikipedia

    en.wikipedia.org/wiki/Lifeless_Planet

    Lifeless Planet is a 2014 puzzle adventure developed by independent American company Stage 2 Studios and published by Serenity Forge. The game was released on June 6, 2014 for Microsoft Windows and on June 23, 2014 for OS X, and has been ported to the Xbox One on May 13, 2015, Linux on March 25, 2016 and to the PlayStation 4 on July 19, 2016.