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Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium. [68] About 0.9% of the Sun's mass is oxygen. [19] Oxygen constitutes 49.2% of the Earth's crust by mass [69] as part of oxide compounds such as silicon dioxide and is the most abundant element by mass in the Earth's crust.
At current rates of primary production, today's concentration of oxygen could be produced by photosynthetic organisms in 2,000 years. [4] In the absence of plants, the rate of oxygen production by photosynthesis was slower in the Precambrian, and the concentrations of O 2 attained were less than 10% of today's and probably fluctuated greatly.
The rise in oxygen content was not linear: instead, there was a rise in oxygen content around 2.3 Ga, followed by a drop around 2.1 Ga. This rise in oxygen is called the Lomagundi-Jatuli event , Lomagundi event , [ 98 ] [ 99 ] or Lomagundi-Jatuli excursion [ 100 ] (named for a district of Southern Rhodesia ) and the time period has been termed ...
Hippos can defecate into rivers so much that their feces builds up and kills fish through hypoxia, or lack of oxygen. In the Mara River, about 4,000 hippos poop out more than 9 tons of dung each day.
Image credits: kill_a_kitten #2. When a caterpillar enters a chrysalis and becomes a butterfly, it doesn't just sprout wings and legs. It essentially disintegrates into goo, and a new butterfly is ...
On the other hand, Rutledge warns that short-form videos often lack a compelling story arc, which leads to more scrolling, switching between content, and, ultimately, you guessed it: more boredom. #10
Liquid oxygen has a clear cyan color and is strongly paramagnetic: it can be suspended between the poles of a powerful horseshoe magnet. [2] Liquid oxygen has a density of 1.141 kg/L (1.141 g/ml), slightly denser than liquid water, and is cryogenic with a freezing point of 54.36 K (−218.79 °C; −361.82 °F) and a boiling point of 90.19 K (−182.96 °C; −297.33 °F) at 1 bar (14.5 psi).
So, scroll down and find some intriguing, quick, but cool facts. Who knows, some of them might even surprise you; like how long it 30 Strange But Interesting Facts To Satisfy Your Never-Ending ...