right below your belly button.
Yes, equal to the weight of the humans.
No. Not yet anyway.
gravity
central Africa
Gravity plays the central role; without gravity, there would be no such thing as an orbit.
the force which lies in the center of the gravity
Humans do not defy gravity by nature. They are subject to the force of gravity just like all other objects on Earth. However, humans can overcome gravity temporarily through methods like jumping, flying in aircraft, or floating in water, but the force of gravity always exists.
The moon's gravity affects humans by causing tides in the oceans and potentially influencing biological rhythms, but its impact on individual humans is minimal due to the Earth's stronger gravitational pull.
The lack of gravity and exposure to artificial gravity severely weakens bones.
Earth is a massive object having huge mass. Any object that has mass has gravity. Similarly humans have mass and they also have gravity. When you bring two masses together they exert force of gravity on each other, the heavier the mass the more is the force of gravity. Compare to humans earth has huge mass and so it exerts more force of gravity on humans. This is why we humans are on earth. Or more correctly that's why we stick to the Earth, not how we got here. Personally, I arrived by space ship.
No.
zero gravity