There can be two explanations for this - one, that the Earth at some point just stops, as if you were looking off the edge of a table. The other is that the Earth is round. Hundreds of years ago, before the invention of the compass or sextant, precise navigation for ships was difficult, even with the stars.
www.physlink.com/education/askexperts/ae535.cfm
name Ann status student age 14 Question - Can you give one undisputable answer to: "Is the earth round, and how do we prove it." Because we are having a debate in my class, ... Let's take the flat earth versus round earth hypotheses as an example. A round earth is the most stable shape according to gravitational theory;
www.newton.dep.anl.gov/askasci/gen99/gen99427.htm
Author: bragee Text: Why is the earth round? Response #: 1 of 1 Author: Robert Topper Text: An interesting question. Now, the first question that comes to my suspicious mind is "IS the earth round?" And the answer is no, at least not perfectly round.
www.newton.dep.anl.gov/newton/askasci/1993/general/GEN0... www.newton.dep.anl.gov/newton/askasci/1993/general/GEN007.HTM
Also see William Carpenter, “One Hundred Proofs that the Earth Is Not a Globe”. B. Some evidence for the round earth concept: 1. On a flat earth, ...
www.indiana.edu/~ensiweb/lessons/flatrth1.pdf
Turbulent ship wakes: further evidence that the Earth is round; David K. Lynch; When viewed from the stern, a ship’s turbulent wake appears as a narrow strip of bubble-whitened water converging toward the horizon.
thulescientific.com/TurbulentShipWakes_Lynch_AO_2005.pd... thulescientific.com/TurbulentShipWakes_Lynch_AO_2005.pdf
It has actually been known that the Earth was round since the time of the ancient Greeks. I believe that it was Pythagoras who first proposed that the Earth was round sometime around 500 B.C. As I recall, he based his idea on the fact that ...
http://starchild.gsfc.nasa.gov/docs/StarChild/questions...
In the verse, Lord of the two Easts, and Lord of the two Wests, there is sure evidence that the earth is round because two Easts and two Wests can come about only when the earth is round; for when the sun rises over one region it sets in another, and when it sets in one sphere it rises in another.
www.answering-christianity.com/earth_round.htm www.answering-christianity.com/earth_round.htm
the Round Earth Project ... realized at the University of Illinois at Chicago ... - About the Round Earth Project - Publications and Presentations - Project Members - Tele-Immersive Learning Environments...
www.evl.uic.edu/roundearth/ www.evl.uic.edu/roundearth/
It's easy to wonder how we know the Earth is round. After all, it does look flat! But there is lots of evidence. Nowadays, it's very easy: look at a picture taken from space! All the pictures of the Earth show it to be a big ball.
www.badastronomy.com/mad/1997/earth.html www.badastronomy.com/mad/1997/earth.html
Pictures from space for one, the laws of gravity for two and the curved horizon for three - not to mention the planes that fly and ships that sail around the world on a regular basis.
http://wiki.answers.com/Q/What_evidence_proves_that_Ear...