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  2. Spherical Earth - Wikipedia

    en.wikipedia.org/wiki/Spherical_Earth

    Image from space: The curved surface of the spherical planet Earth. Spherical Earth or Earth's curvature refers to the approximation of the figure of the Earth to a sphere.The concept of a spherical Earth gradually displaced earlier beliefs in a flat Earth during classical antiquity and the Middle Ages.

  3. Empirical evidence for the spherical shape of Earth - Wikipedia

    en.wikipedia.org/wiki/Empirical_evidence_for_the...

    The shadow of Earth on the Moon during a lunar eclipse is always a dark circle that moves from one side of the Moon to the other (partially grazing it during a partial eclipse). The only shape that casts a round shadow no matter which direction it is pointed is a sphere, and the ancient Greeks deduced that this must mean Earth is spherical. [8]

  4. Wikipedia : Why Wikipedia cannot claim the Earth is not flat

    en.wikipedia.org/wiki/Wikipedia:Why_Wikipedia...

    Source X was from a scientific journal, it attempted to address the Flat Earth theory in a way that science could deal with it. But Flat Earth theory is not amenable to scientific treatment. Source X misunderstood what the theory was really saying. The Flat Earth theory is not something that is really a 'fact' in the scientific sense.

  5. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.

  6. Pythagorean astronomical system - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_astronomical...

    In this system the revolution of the earth around the fire "at the centre" or "the fire of the hearth" (Central Fire) was not yearly, but daily, while the moon's revolution was monthly, and the sun's yearly. It was postulated that the earth's speedy travel past the slower moving sun resulted in the appearance on earth of the sun rising and setting.

  7. A Mirror Version of Life Could Pose a Threat to Life on Earth ...

    www.aol.com/lifestyle/mirror-version-life-could...

    While these “mirror cells” could have profound medical implications, a new 299-page report warns that a mirror pathogen could spell the end of life on Earth, as such a microbe would avoid our ...