According to Google, of all species that have existed on Earth, 99.9 percent are now extinct. This statement is so difficult to comprehend that we cannot possibly fully appreciate its import. It is true that many of the species referred to are things humans would never be aware of; nonetheless, how can we have lost all but 0.1 percent of all species that have ever been placed on earth?
If you ponder that for a while it makes us wonder what else we have lost that would not rise to the classification of a species, just a way of life or some part of our past lives that has been lost. For example: