3 ms·
I was thinking of Prototaxites which was maybe 470m years old (possibly) and humongous. Sounds like sponges are it (oldest) then. Until we learn otherwise.
by daddylongstroke 5y ago
I was thinking of Prototaxites which was maybe 470m years old (possibly) and humongous. Sounds like sponges are it (oldest) then. Until we learn otherwise.