Aboriginal Australians lived in Australia with kangaroo's long before Europeans. Since the Aboriginal people kept no written history, we cannot narrow it down to a single person.
well he got descoverd in the 1895and so did some other people
olivia
sarah malcome
usher
1743
1920
flamsteed
J.J Thomson
Alfred wegener
1898 in United Kingdom
1974
Argon was isolated in 1894.