Sometimes this question might have come to your mind that if the earth is round then why don't the people living at the bottom fall down? One thing we all have been hearing since childhood that the earth is round in shape and revolves around the sun and we do not even realize that the earth is rotating at a speed of 1,674 km/hr. On seeing the earth map or globe, you must have always been curious to know why do people who live downwards do not fall into space.
So before knowing the answer, we need to know first what actually exists on the bottom side of the earth. In reality, the earth's bottom side actually remains respective, because nothing actually exists below or above in space. When the moon is seen from the earth, the moon is up, and similarly, the earth is up when viewed from the moon.
So if we want to answer this question in one line, the fact remains that Earth has a gravitational force. Let's prove this scenario with an example, if a piece of iron sticks to a strong magnet, then it doesn't matter in which direction the magnet keeps rotating or moving, that iron will remain stuck to it in a fixed position. Similarly, our earth is also like a magnet, so no matter where we are, the earth keeps us bound by the force of gravity, and hence, we do not fall down.
Thus if some people were to stand at some point at the bottom, according to that it would become their upward and downward, as they would feel that the sky was above their heads and their feet were on the earth. If the earth is round, for the person standing in the upper position (top), the sky would appear to be above and the ground at the bottom. Similarly, for the one who is standing on the opposite end (bottom), the sky will still appear above and the ground below.
Read:-What if all the oceans' water disappeared? The terrible fate of our world without oceans
Due to the force of gravity, whichever side the person is standing, it would be up and down for him. Gravity is the reason due to which we are surviving here, if there is no gravity then we all would have started floating in the air. Most importantly, there is nothing left in the universe that is not affected by the force of gravity. However, dark matter and dark energy have different concepts, but under normal circumstances, the force of gravity exists in every matter. Simply put, that part of the universe that appears to be made of a mysterious, invisible substance called dark matter and a force that repels gravity is known as dark energy.
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