Oxygen

• Primordial oceans had oxygen 250 million years before the atmosphere (18 Aug 2018)
  
• Decades of data on world's oceans reveal a troubling oxygen decline (15 Aug 2018)
  
• Method of making oxygen from water in zero gravity raises hope for long-distance space travel (12 Jul 2018)
  
• Tiny microenvironments in the ocean hold clues to global nitrogen cycle (22 Apr 2018)
  
• 'Quartz' crystals at the Earth's core power its magnetic field (08 Oct 2017)
  
• Fossil fuel formation: Key to atmosphere’s oxygen? (05 Oct 2017)
  
• Study provides strongest evidence oxygen levels were key to early animal evolution (19 Mar 2017)
  
• Self-healing material could plug life-threatening holes in spacecraft (14 Jun 2016)
  
• At the cradle of oxygen: Brand-new detector to reveal the interiors of stars (03 Jun 2016)
  
• Ancient rocks record first evidence for photosynthesis that made oxygen (08 Oct 2015)
  
• Study: Photosynthesis has unique isotopic signature (10 Sep 2015)
  
• The quantum dance of oxygen (17 Aug 2014)