Knowns, Unknowns and Unknown Unknowns
We’ve identified about 1.7 million species, but millions more remain unidentified (we think). The total number of non-fungal animal and plant species could be as high as 8 or 9 million (maybe). And the ratio of known to unknown differs quite a bit depending on which category of life you’re looking at.
How long will our invertebrate bias go unchecked?!?
And of course, none of this even mentions the microbes …
(via National Geographic)
Source: National Geographic