Why life is possible in Earth?
It is a wonderful planet. We get everything exactly how we
need it. Right quantity of oxygen in the atmosphere to support respiration
perfectly balancing with Nitrogen to create an ecological balance. Sufficient greenhouse
effect to serve as a barrier to stop the UV rays of the Sun from hitting us
directly. Abundance of life giving water and the nature’s cycle that
re-vitalizes it. Inner core of the earth crust that consists of molten lava
consisting mostly of ferrous materials creating an excellent magnetic barrier.
But how everything got into play exactly at the right time
to create that magical moment when the first life came into existence, is still
a mystery. Life by itself is another mystery that may not get clarified in our
life time. But at least we can ponder about the facts that make life possible
in earth.
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Basic element in the material world is Hydrogen which consists
of a nucleus having one proton and an electron circling around it. Within three minutes of the big bang protons
and electrons were formed and that started the creation and expansion of the
Universe. It is a real, hard journey from there for the creation of elements
with higher configuration. Creation of stars is actually ignition of Hydrogen
by nuclear fusion creating Helium in the process. Helium is again an element that
has two protons and two neutrons in the nucleus with two electrons revolving
around it.
When more and more helium is formed hydrogen concentration
in the star reduces gradually and the next level of nuclear fusion happens that
mingles helium atoms to create higher atomic particles like nitrogen, oxygen
and carbon. These three along with Hydrogen form the basis of composition that
created and sustained life in earth.
How we are gifted with this life sustaining atmosphere?
At the time of creation, earth was having a different kind
of atmosphere that mostly consisted of hot hydrogen and helium vapors. Two
vital forces constantly act on all the planets and stars – Gravitational pull
and centrifugal force. For anything to stick to the earth surface both the
forces have to be in equilibrium. I the case of Hydrogen and Helium, the
centrifugal force exceeded gravitational pull of the earth and the main
contributing factor could be lighter configuration of these two elements.
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After disappearance of the first and the basic atmosphere, a
second atmosphere started building up with the gases released by the earth’s
crust due to volcanic activities and eruptions. This second atmosphere mostly
consists of water, ammonia and carbon-di-oxide that came out during volcanic eruption
from inside the earth. Even though this atmosphere is also not suitable for
creation of the present day living cells, it was supportive for a special
bacteria that feeds on carbon-di-oxide. The first thing that happened is a particular
quantity of Carbon-di-oxide got dissolved in by water in the oceans. With this
dissolved gas the bacteria began to thrive happily.
The interesting part of this build up is that these bacteria
consumed carbon-di-oxide and let out oxygen. Further and further quantities of Carbon-di-oxide
started dissolving in the waters as continuous depletion was happening due to
its consumption by bacteria. Oxygen released by these bacteria started building
up in the atmosphere. At the same time Sun also played an important role by
disintegrating ammonia into nitrogen and hydrogen by the UV radiation and
lightning. Hydrogen as it is a lighter element subsequently escaped into space.
Concentration of oxygen and nitrogen slowly increased and
the present day atmosphere is formed.
How water came into existence in our planet?
Even before the build-up of oxygen in the atmosphere water
was found in our planet. Hydrogen when burned with oxygen forms water and without
oxygen and hydrogen water formation in the earth wouldn't have been a
possibility. The most accepted theory most of the scientists is that water
would have come to our planet through asteroid collision. An asteroid or
multiple asteroids with abundant water would have collided with the earth and
would have created oceans that we see today.
Presence of water alone does not guarantee creation of life.
Lots of planets and moons are now discovered with frozen water where life
cannot sustain. Water has to be in the liquid form and should be moving to
create life. The right kind of temperature to bring this favorable condition
is provided by calculated distance of earth from the sun and the atmospheric
cover that protects it from the direct UV radiation of the sun.
Not only we, but the earth is also live:
Creation of life is not possible if the earth where we are
living is not active. Even with all the life supporting ingredients live may
not evolve in dead planets where there is no activity. Our earth is vibrant in many
ways that helped creation and still helping to sustain it. The magnetic field
created by earth deflects the dreadful solar wind that comprises of highly
charged particles. If those solar winds reach the surface of the earth no
living being could survive. The earth’s magnetic field is created by the inner
core of the earth. It is produced by the motioned of highly conductive ferrous
alloys present in the earth’s core.
If not for the active core in the center of the earth, living
in earth is not a possibility. The inner core that resembles the womb of the
earth is always active and live and this activity keeps the life going on
earth.
Our loving earth is active in the space with its gravitational
pull and magnetic attracted, active on the surface creating climatic conditions
and active inside that protects us from the solar wind. Earth could be the
bigger living being that hosts millions of sub-beings on its surface,
atmosphere and inner layers.
We, the ultimate of living beings born right from
the womb of mother earth, knowingly and unknowingly plot for the extinction of
its existence. The plot will be unearthed in my next plot.
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