how many animals in different species live on planet earth
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.
Suzanne Goldenberg, US environment correspondent. Tuesday 23 August 2011 17.00 EDT First published on Tuesday 23 August 2011 17.00 EDT. Humans share the planet with as many as 8.7 million different forms of life, according to what is being billed as the most accurate estimate yet of life on Earth.