Earth’s oldest creature…  Sea sponge…. 

According to the various  researches done….  The sea spong  is expected to be the first on earth, this was  done  by collecting  the fossils  and doing  various chemical and molecular tests on it.  So finally they  came to know that it matched with the  sea sponges which are still having the same characteristics….  They are expected  to be living  from 540million  years……

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