Board Thread:Fun and Games/@comment-29779988-20161112192133/@comment-25876622-20161112201226

How many animals are there in total? According to [G. Miller; Scott Spoolman (2012). Environmental Science - Biodiversity Is a Crucial Part of the Earth's Natural Capital] ,

Estimates on the number of Earth's current species range from 10 million to 14 million According to this web page,

Mathematician, computer science expert and animal rights advocate Brian Tomasik has attempted to catalog estimates of the number of individual animals in a variety of groupings. According to his data, the total number of individual animals on the earth adds up to approximately 20,000,121,091,000,000,000. This can be written as 20 quintillion, or 20 billion billion.