gravity
Gravity works as a magnet to hold us to the ground.
The Earth's gravity keeps the gasses in the atmoshere drawn to the planet.
"Down to earth" is a colloqialism that is said about a person who is and conducts himself truthfully, honestly and gives of himself without reservation. Another such colloquialism is "salt of the...
So he does not bite, or scratch.
Carlo Petrini on the Detachment of Man from the Earth
Bioengineering Holding Up the Himalayas in Nepal
Holding Cattles in Botswana
The Problems of Lease Hold and Community Forestry in Nepal