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Evolution − Articles

 

What is life?

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What is life?
The question is as stunning as it relates to the philosophical aspect that the chemistry of life. We find that life evolves in time by taking a path defined by an infinite number of parameters, making it unpredictable and indefinable.
There is however a biological definition of life: "A living organism is said when exchange of matter and energy with its environment maintaining its autonomy when it reproduces and evolves by natural selection. "
All living organisms ensure their stability by reacting to changes in their environment.

 

Life has a faculty of adaptation and learning. Is it not rather this life?
But we also see by observing galaxies, stars and planets, that matter is able to self-organize without being alive. However, a good definition of life should consider this concept, ie, the ability of the material to gradually climb the ladder of complexity.
A study funded by NASA indicates that the heavy bombardment of asteroids that took place there nearly 4 billion years, not enough to completely sterilized the Earth. The study focused on an event known as the end of bombardment (Late Heavy Bombardment) or LHB.

 

The tenacity of life is it not proof that it is present throughout the universe, patiently waiting for favorable conditions to continue its path towards complexity?
It's hard to believe that life exists only on Earth.
Wherever there is liquid water, there is a possibility of life even under the icy crust of some planets and satellites of planets.
Life is developing in places where even the sun's energy does not penetrate, we see into the depths of our planet.

It recognizes life that when seen.

particles galaxy NGC1672
Particles to the
biochemical life...
Are we alone
in the universe?
  
ice cores tell us about the past...megapode the archipelago of Papua New Guinea
Ice cores tell us
about the past...
Megapode uses the volcanic heat...
  
organ regeneration, salamandernatural selection, the peppered birch
Organ regeneration, salamander...Natural selection, the peppered birch...
  
Mephisto the little worm of the deep Earthliquid water, accelerator of chemical reactions
Mephisto, the little worm
of the deep...
Liquid water, accelerator
of chemical reactions...
  
bipedalismHomme de Neandertal
The bipedalism
in hominids...
Neanderthal, the first
man disappeared...
  
See the exoplanetsLiving on Mars
Turn off the stars
and see the exoplanets...
Living on Mars...
 
 
Aristotle's geocentric worldtardigrade, water bear
Egocentric vision, the
man at the center...
This animal is
immortal...
  
arpithecus ramidusthe tree of life
Ardi is older
than 4 million years...
Border between
inanimate and living...
  
explosion of life in the Ordoviciancyanobacteria at the origin of oxygen
Explosion of life
in the Ordovician...
Cyanobacteria release
a toxic gas, oxygen...
  
2012 the end of the worldThe smallest frog in the world
2012
the end of the world ?
The smallest frog
in the world...
  
Asimo the future humanoidearthshine from the Moon
Asimo the future
humanoid...
Earthshine,
evidence of the life...
  
world populationCrab Stalin or crab giant
The world population,
always galloping...
Kamchatka crab giant...
 
Toumai skull fossilmammouth
Toumai our ancestor,
old 7 million years...
Trace of life frozen
in Siberia...
  
Fish of the Abysslife evolves, sheltered from the glaciations
Life in the abyss
is surprising...
Life evolves, sheltered
from glaciations...
  
DNA carrier of genetic informationcosmics rays
Story of the evolution
towards the living...
Cosmic rays and
mutation of species...
  
The frozen Thames in 1677, Little Ice Agefullerenes or buckyballs
The Little Ice Age...
Discovery of buckyballs
solid in space...
  
Bioluminescence of living organismsConditions for the emergence of life
Bioluminescence of
living organisms
Conditions for the
emergence of life...
  
Soupe primitiveinert and living
Primordial soup...
 
Passage between
the inert and the living...
 
star
 
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