That the Earth is round was known to ancient cultures but this knowledge was suppressed in Europe, mainly by the Catholic Church whose dogma insisted that Earth was the centre of the cosmos and lay under Heaven and above Hell. This is surprising since some of the best thinkers in Europe were clerics and monks within the Catholic Church.
WATER
Actually the ancient Greeks were the first to realize the world was round.
Johannes Kepler.
In 1838 Friedrich Bessel was able to measure the parallax of the nearby star 61 Cygni and thus determine its distance and independenly confirm the fact that the Earth orbits round the Sun.
Ptolemy
Aristotle concluded that the world is round by realizing that the farther the ship goes the more of it disapears.
Because during a lunar eclipse, Aristotle observed that the shape of the earth was round.
It is uncertain but variously ascribed to Pythagoras, Parmenides and Empedocles by their later promoters.
It always casts a curved shadow during a lunar eclipse
WATER
In the Dark Age of Science, it was believed that Earth was in the center of Solar System and all the planets including sun, revolve round the sun. This is called Geocentric Theory.Nicolas Copernicus, A Polish*Astronomer, proved that earth and other planets revolved round the sun. This is Heliocentric Theory.(Copernicus proposed the Heliocentric Theory in 1543, 64 years before the invention of telescope. I was all the work of his Mathematics.)_________________________________________________________________* Polish Astronomer is an Astronomer from Poland
Actually the ancient Greeks were the first to realize the world was round.
Your mom. It was your mom who concluded it.
Any early man that could use common sense would have figured that one out.
earth science
Helium was discovered in 1868 as a new spectral line in light from the sun by French astronomer Jules Janssen during a total solar eclipse in Guntur, India. In the same year, Norman Lockyer, an English Astronomer concluded that the new spectral line was caused by an element in the Sun unknown on Earth and named it Helium. In 1882, Italian physicist Luigi Palmieri detected helium on Earth for the first time. March 26, 1895 Sir William Ramsay, a Scottish chemist, isolated helium on Earth.
Ptolemy