24 July,2024
Credit: Pixabay
These are extinct marine arthropods that appeared around 521 million years ago during the Cambrian period.
Credit: Google
Marine animals that resemble clams, which first appeared over 500 million years ago in the Cambrian period.
Credit: Google
This group includes jellyfish and corals, which have been around for over 700 million years.
Credit: Google
Simple multicellular organisms that date back over 600 million years.
Credit: Google
Ancient relatives of modern squids and octopuses, first appearing around 500 million years ago.
Credit: Google
These have been around for over 450 million years.
Credit: Google