It was probably several thousand years ago.
The first correct observation was made by Tycho Brahe
the first observation made after a crime is committed.
The first correct observation was made by Tycho Brahe
Carl Friedrich Gauss
The first recorded observation of a nova was made by Chinese astronomers in 185 AD.
The Earth.
how long ago was earth made
Which observation can be made about leave cutter ant?
They were made on earth.
countries are not made but they already are in earth and so USA is not made first.
Earth
I'm not sure.Thr first offical "earth day", was made in 1970