The Size of the Earth

When people stand up and begin walking, they feel no pressure in an
upward or downward direction. Sitting, walking, and running are
exceedingly mundane activities. Yet each time people engage in such
activities, they are completely unaware thatthey are resisting a very
powerful gravitational force.
The most important reason for this is the sizeof Earth. If it were
just slightly smaller, gravity would be far weaker, the planet's
atmosphere would fragment and disappear, and we would be unable to
remain stable in the world. If the Earth were larger, gravity would
increase considerably and various poisonous gases would make our
atmosphere lethal. Even if we managed to protect ourselves from these
gasses, we would be unable to move.
Yet such a problem never arises, because Earth's size has been
determined in a manner that makes human life possible. The conditions
that combine are so delicate that there is no way even one of them
could have come about by chance. Scientists have calculated the oddsof
such an event as 1 in 10123. 1 Clearly, the accidental formation of
an environment suited to life is impossible.
Were Allah willed so, He could make each star and planet suitable for
life, arrange matters so that human beings had no need to eat or
drink, breathe gasses in specific proportions, or gravity or the Sun.
But Allah, Who created all that exists, willed to bring together all
of the astonishingly detailed conditions necessary for life to remind
people that He created and controls everything and to give us the
opportunity to appreciate His infinite might and turn to Him:
He to Whom the kingdom of the heavens and Earth belongs. He does not
have a son, andHe has no partner in the Kingdom. He created everything
and determined it most exactly. (Surat al-Furqan,2)