Oxygen levels in the Earth's atmosphere are likely to have 'fluctuated wildly' one billion years ago, creating conditions that could have accelerated?the development of early animal life, according to ...
The oxygen we need to live makes up about 21% of our atmosphere, but it wasn’t always so. For its first 2⅟₂ billion years, Earth’s atmosphere had no oxygen. Then, with the advent of organisms capable ...
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Rising deep-ocean oxygen levels likely opened up new marine habitats and spurred speciation
Some 390 million years ago in the ancient ocean, marine animals began colonizing depths previously uninhabited. New research indicates this underwater migration occurred in response to a permanent ...
Europa, one of Jupiter’s Galilean moons, hosts a liquid ocean beneath a frozen shell. Because of its proximity to Jupiter, the moon is constantly hit with radiation that erodes its icy surface, ...
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