jan 1, 650000000 BC - First Demosponges appear
Description:
Form first skeletons of spicules made from protein spongin and silica – brightly coloured these colonial creatures filter feed since they lack nervous, digestive or circulatory systems and reproduce both sexually and asexually.Added to timeline:
Date:
jan 1, 650000000 BC
Now
~ 5883516 years ago