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2. Geological history of oxygen - Wikipedia

   en.wikipedia.org/wiki/Geological_history_of_oxygen

   The increase in oxygen concentrations had wide ranging and significant impacts on Earth's biosphere. Most significantly, the rise of oxygen and the oxidative depletion of greenhouse gases (especially atmospheric methane ) due to the GOE led to an icehouse Earth that caused a mass extinction of anaerobic microbes , but paved the way for the ...

3. Here’s How Our Planetary Defense System Works - AOL

   www.aol.com/planetary-defense-system-works...

   “An object of that size, comes this close to Earth, this is only 2,200 miles above the surface of the Earth, on average once a year,” said Davide Farnocchia, a navigation engineer at NASA’s ...

4. Life-support system - Wikipedia

   en.wikipedia.org/wiki/Life-support_system

   The life support system provides a nitrogen/oxygen atmosphere at sea level partial pressures. The atmosphere is then regenerated through KO2 cylinders, which absorb most of the CO2 and water produced by the crew biologically and regenerates the oxygen, the LiOH cylinders then absorb the leftover CO2.

5. ISS ECLSS - Wikipedia

   en.wikipedia.org/wiki/ISS_ECLSS

   The interactions between the components of the ISS Environmental Control and Life Support System (ECLSS) The International Space Station (ISS) Environmental Control and Life Support System (ECLSS) is a life support system that provides or controls atmospheric pressure, fire detection and suppression, oxygen levels, proper ventilation, waste management and water supply.

6. Iron Beam - Wikipedia

   en.wikipedia.org/wiki/Iron_Beam

   Iron Beam (Hebrew: מגן אור, romanized: Ma'gen Or, lit. 'קרן ברזל'), officially מגן אור, Shield of Light is a directed-energy weapon air defense system unveiled at the Singapore Airshow on February 11, 2014 [3] by Israeli defense contractor Rafael Advanced Defense Systems.

7. Oxygen cycle - Wikipedia

   en.wikipedia.org/wiki/Oxygen_cycle

   The Earth's atmosphere, hydrosphere, and biosphere together hold less than 0.05% of the Earth's total mass of oxygen. Besides O 2, additional oxygen atoms are present in various forms spread throughout the surface reservoirs in the molecules of biomass, H 2 O, CO 2, HNO 3, NO, NO 2, CO, H 2 O 2, O 3, SO 2, H 2 SO 4, MgO, CaO, Al2O3, SiO 2, and ...

8. Atmosphere of Earth - Wikipedia

   en.wikipedia.org/wiki/Atmosphere_of_Earth

   Total atmospheric mass is 5.1480 × 10 18 kg (1.13494 × 10 19 lb), [36] about 2.5% less than would be inferred from the average sea-level pressure and Earth's area of 51007.2 megahectares, this portion being displaced by Earth's mountainous terrain. Atmospheric pressure is the total weight of the air above unit area at the point where the ...

9. High altitude breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/High_altitude_breathing...

   The oxygen source may be chemical oxygen generators, high pressure portable gaseous oxygen storage systems (gas cylinders), on-board oxygen generating systems (oxygen concentrators), or liquid oxygen systems. [4] Chemical oxygen generation is commonly used on large commercial aircraft as a source for the emergency oxygen system for passengers ...