Dickinsonia lived in the late Ediacaran oceans more than 540 million years ago before the Cambrian explosion when the first recognisable animals emerged.  We now know that 93% of Dickinsonia organic molecules had 27 carbon molecules which means they produced cholesterol, the signature of animal cells.  Whilst not equivalent to the T-Rex predator of the Ediacarans, it is a special animal of an early ecosystem which we celebrate by hand carving their forms and intimating their movements.