Which rank is this article about?
Kingdom
What is above it?
domain
And below it?
phyla
How many kingdoms does the US recognize?
Six
And elsewhere?
Five
How many kingdoms do they agree on?
Four
Which ones are those?
Animalia, Plantae, Fungi and Protista
What kingdoms does the US have that the others don't?
Archaea/Archaeabacteria, and Bacteria/Eubacteria
And which ones do others have that the US doesn't?
Monera
Who created this system?
Carolus Linnaeus
When?
1735
What science is this part of?
biology
Was kingdom the highest rank at first?
yes
Is it still?
no
Why not?
in the 1960s a rank was introduced above kingdom
What's another name for domain?
empire
Originally how many ranks were below kingdom?
four
What were they?
class, order, genus and species
Is it still like that?
no
What happened?
later, 2 other ranks were introduced