A large part of this biodiversity is made up of other organisms.
72,000 species of fungi, some resting on your feet and on your pizza;
Can you even imagine how many bacteria there must be?
Why didn't we make these pictures all the same size? Move forward to find out!
Protist © 2003 California Academy of Sciences; Almond Mushroom (Agaricus subrutilescens) © Br. Alfred Brousseau, Saint Mary's College; Pinemat Manzanita (Arctostaphylos nevadensis) by William R. Hewlett, © 1999 California Academy of Sciences.