Unknown. The planet Venus is clearly visible in the sky, and prehistoric man could see it easily.
error
there was no date
It was discovered in 1898.
It was discovered in 1898.
1922 was the date that vegemite was discovered
He was discovered in 1891
Protactinium was discovered in 1913 by Fajans and Gohring in Karlsruhe, Germany.
Antimatter was discovered in 1928 by Paul Dirac.
2013
1807
2005
1325