Is New Zealand in Australasia?
Yes
How about Australia?
Yes
New Guinea too?
sometimes
Why?
usually considered part of Melanesia
Who came up with this terminology?
Charles de Brosses
When?
1756
Where?
"Histoire des navigations aux terres australes"
How New Zealand can be part of it too?
unknown
Is Melanesia part of it Physiographically?
Yes
What latitude demarcate it?
47° south