HOW LIFE BEGAN

 Hey guys! This is the first post for this blog and will contain some amazing and tremendous information and at last will have some mind blowing facts ....so let's start.... 

Billions of years ago, a chance combination of chemicals somewhere on Earth's surface created a substance that would soak up energy and reproduce itself - the first living organism. This was the beginning of the amazing story of life on EARTH.

      I-SIGNS OF LIFE

Planet Earth was formed from a cloud of space rock, dust, and gas. For millions of years it was a mass of hot molten rock with a poisonous atmosphere. But eventually it's crust cooled to the point where water could form vast oceans.

The shallow fringes of these oceans were probably where life began, about 3.8 billion years ago, in a series of chemical reactions that assembled the first living cells

    1.EARLY EARTH  - For 500 million years, Earth was a giant furnace of searingly hot rock, constantly bombarded by asteriods and meteorites. As each lump of space rock crashed into the planet, it's energy was converted into more heat. But these impacts also delivered chemical elements that were to be the vital ingredients of life.

    2.CHEMICAL CAULDRON - As the planet cooled, huge volcanoes filled the air with toxic gases. But they also  erupted vast quantities of water vapour that cooled and fell as rain, filling the oceans. Lightning may have triggered chemical reactions in the water, forming complex molecules that were able to make copies of themselves - the basis of life.

    3.FIRST CELLS - The chemical processes that were essential to life needed to occur in a protected place. This was provided by a substance that could form tiny, tough-walled bubbles. These were the first microscopic packages of life-giving chemicals that became bacteria, the simplest surviving life forms. 

    4.ENERGY FROM LIGHT - Life needs energy. The first cells used chemical energy, but about 3.5 billion years ago cells called cyanobacteria started using solar energy. They used it to make food from water and carbon dioxide, releasing vital oxygen. Similar cyanobacteria created these stromatolites on the coast of western Australia. 

    5.DEEP HEAT  - It is likely that the first living cells developed in warm, coastal pools of salty water. However, life may have begun in the deep ocean, around hot volcanic vents that gush energy-rich chemicals from the ocean floor. Simple organisms that still live around these vents are probably very like the earliest living cells.

  II-VARIETY OF LIFE

      As soon as life began, it started to change. Living things thrive by making copies of themselves, but the copies are not exact. Over time, the differences generate new forms of life. This process of change, called evolution, has created the diversity of life on Earth.

   1.EVOLUTION

      Every living thing is slightly different from its parents. If the difference helps it to survive, it is likely to pass on the advantage to its young. This  is the basis of evolution. Many years later, it may lead to a change that is large enough for the result to be called a different species.

    2.NATURAL SELECTION

      

      The main mechanism of evolution is called natural selection. Life in the natural world   is a competition, with losers and winners. Those that survive and breed happen to   have them thrive in their habitat. But if conditions change, the winners may turns into

      losers........Its simple as it says "Survival of the Fittest".

      III-WRITTEN IN STONE

      

       

We know that life has evolved over time because rocks contain evidence of different life forms that thrived in the distant past. These links with a vanished world are called fossils. Typical fossils preserve the forms of bones, teeth, and shells. By comparing them with those of familiar animals, scientists can piece together the story of evolution. Every new fossil that is discovered makes the picture clear.

   

     IV-CHANGING PLANET

   The history of life is not a story of steady progress. Living things have faced many global disasters caused by things like asteroid impacts and climate change. Some have left very few survivors, which have had to live an altered world. This has changed the direction of evolution several times, so new types of animals and plants have evolved while others have become extinct.

      TODAY'S FACT

       IN THE PAST 500 MILLION YEARS, MORE THAN 90 PERCENT OF ALL LIFE ON EARTH HAS VANISHED 😎😎😏💨💥👽👽

         

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