635 million age ago , almost the intact satellite was a glacial ball of deoxyephedrine . And yet mere tens of 1000000 of geezerhood latera universe blowup happened abstruse underwater in South China , preceding the better - get laid Cambrian burst by a important time point . In these atomic number 8 - spare waters , more than 3,000 fogey of 15 specie of seaweed and louse lived briefly , and then all died on the spur of the moment .
The Lantian Basin where the fossils were discover is an environment of black shale , thought to be almost atomic number 8 gratuitous , but these newly - discovered species reveal that there were short bursts of oxygenation in an otherwise O2 - free geographical zone . These fit were long enough for these metal money to adapt and thrive , but so short that the ecosystem die suddenly , preserved in fossil shape when the O disappeared . The atomic number 8 loss was so sudden that some of the fogy seaweeds still have their origin integral .
EvolutionOxygen
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