But Who am I to argue with scientists
it was the asteroids that helped the planet gradually become covered with water according to one theory the
asteroids carried with them a tiny amount of life-giving moisture and
delivered it to earth that's how over billions of years about half of the water of the world ocean came to earth from space after the bombing ended that is about three billion eight hundred million years ago the temperature of the earth began to slowly decline but current life forms couldn't survive on the planet's surface anyway because there was no oxygen in its atmosphere and there was no ozone layer to block ultraviolet radiation however there are fossils.which are about three billion five hundred million years old which means that life on Earth could have arisen
much earlier than we used to think from three billion two hundred million to two
billion eight hundred million years ago
almost the entire surface of the planet was occupied by a shallow ocean the
temperature of which ranged from 55 to 88 degrees Celsius that's 131 to 190 Fahrenheit however microorganisms were already inhabiting this hot water the land was
only volcanic islands which were slowly
growing over time just imagine how hot.it was
the days began to lengthen and about two billion five hundred million years ago the first supercontinent kenner land
began to form so let's fast forward a little one billion 500 million years ago
Earth days now lasted at least 16 hours though complex organisms still didn't exist but lithospheric plates continued moving and after 400 million years created another supercontinent Rodinia and after some time Pangaea about 650 million years ago according to popular theory our planet was a snowball
literally this theory is called snowball earth scientists assume that everything was completely covered with ice and even the Equator was as cold as modern.Antarctica it's scary to even think what the temperature was at the poles at this time but even under a thick layer of ice the planet maintained a fairly high
temperature no ice age can kill volcanoes and the carbon dioxide from their eruptions which accumulated in the atmosphere gradually melted the glaciers this melting released a huge amount of oxygen which forever changed the planet
about 541 million years ago the Cambrian explosion occurred temperatures rising
to 30 degrees Celsius or 86 Fahrenheit and a record concentration of oxygen caused a huge number of living organisms to emerge the biological diversity was
so impressive that some creatures even developed exoskeletons to protect themselves from being eaten by others researchers believe that almost all of the existing types of animals appeared during this period the length of the day now reached 22 hours 450 million years ago plants and arthropods began to actively conquer the land 419 million years ago the first insects appeared about 300 million years
ago most of our planet was occupied by swamps many scientists such as professor
Frederick rich this view but the swamps of antiquity were not like modern ones some plants reached 30 meters in height that's about a hundred feet and giant insects flew
everywhere this was thanks to the high oxygen concentration be glad that our modern dragonflies huge ancestors didn't survive to this day seriously
that wouldn't be the most pleasant
replacement for pigeons 252 million
years ago the Permian Triassic extinction event took place destroyed
96% of marine species and 73 percent of terrestrial vertebrate species most
likely numerous eruptions became the
cause of extinction the air was filled with ash and carbon dioxide
there was little sunlight plus lava was
flowing everywhere anyone could die in
this environment dinosaurs then arrived
to replace the destroyed species but not only did huge dinosaurs divide the
planet among themselves the continents also moved about 175 million years and
Pangaea began breaking up the Atlantic
and other oceans appeared and the world began taking on its current form than we see today at this time you could find
the first pine trees preying mantises and bees 50 million years ago the power over the planet was then passed on to mammals without dinosaurs they began
feeling freedom actively spreading
around the planet and evolving with all their might meanwhile the length of the
day had reached almost 24 hours and the temperature stable remained near the 24 degrees Celsius mark that's about 75
Fahrenheit about 8 to 4 million years
ago according to scientists an important split occur
the ancestors of modern Apes began separating from our ancestors each heading down their own evolutionary path about four million years ago the climate
on the planet once again changed of course this didn't happen right away but
it was the climate that turned part of
the dense forest into the savanna
according to one theory this is what
made our distant ancestors climb down from the trees stand up straight and
start looking for food they were not the
only particular species that began
fighting for survival many tried to
adapt to the changes but in the end only
humans succeeded to the degree that they
went on to invent tools the wheel in him
Netflix 1 million four hundred thousand
years ago Homo erectus began to colonize Eurasia 790 thousand years ago they
already knew how to use fire what the population of the earth was exactly
during this period is rather difficult
to calculate you know the population
census at that time wasn't very good and
then about three hundred thousand years
ago Homo sapiens appeared the reasoning
human they appeared and began to
populate the entire earth so actively
that they still can't stop if about 130
thousand years ago the number of our
ancestors range from between 100 to 300
thousand individuals then already 40
thousand years ago the expansion of
reasoning human beings covered almost
the entire planet today the world's population is seven billion eight
hundred million people and continues to
grow.
however the planet is changing along
with its people so who knows what turn
of history awaits us in the future.
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