The Cosmic Calendar first appeared in Carl Sagan's book 'The Dragon's of Eden' (1977). Here you can download the more detailed images from the book.
"In Gaia we are just another species, neither the owners nor the stewards of
this planet.
Our future depends much more upon a right relationship with Gaia than with the never ending drama of human interest." James Lovelock
'The Ages of Gaia'
