In 1965, astronauts James McDivitt and Ed White spotted a massive circular crater-like structure in the middle of the Sahara Desert. Called the “Eye of the Sahara”, the Richat Structure is now known to not be a crater, but a geological pimple. It is theorised to have been molten rock that never fully erupted on the surface that had also collapsed in on itself due to the dissolution of the limestone around its centre.
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If you’re visiting a farm, keep an eye out for an ominous-looking bronze fog. Nitrogen tetroxide, a red-orange gas, is made by certain bacteria during fermentation when oxygen is lacking in the crop. The lack of oxygen causes the bacteria to use the nitrate within the crops, which then produces nitrogen tetroxide. Inhalation of the gas is known to cause permanent lung damage or kill people and livestock. To prevent this, farmers have started performing nitrate tests after four weeks of fermentation. Read full article here