Because humans breathe, which means our volume changes significantly with each breath (by a few litres) but our mass stays the same. Since density is mass/volume, the density changes with every breath too.
deserts ,mines and submarines
Anywhere, they live where they lived when they were human.
You live to find a purpose.
Cold and thin air due to altitude.
They did not all live in the same country.apex
They did not all live in the same country.apex
They did not all live in the same country.apex
They did not all live in the same country.apex
They did not all live in the same country.apex
They did not all live in the same country.apex
They did not all live in the same country.apex
what are the difficult for people to live in