Prehistoric Life On Earth

The Prehistoric Life On The Earth

The Age Of The Earth:

The exact number of years that the Earth had been present in the solar system is unknown. But the Scientists have confirmed that the Earth must have been present for millions and millions of years. When the Earth’s age (4.6 billions years approximately) is written as a number, it appears like this: 4,600,000,000. We can’t imagine thinking of a number like this.

Does Life Exist In The Earth Always?

For the first part of the Earth’s existence (1 billion years), there were no life existences on the Earth. The temperature was extremely hot and so it seemed as though there were no possibilities for the existence of life in the planet. There were absolutely no kinds of human life or animals or plants in this now-human-existing-World. In fact, we can even call the Earth a dangerous place to live in.

Does The Earth Always Look The Same?

The Earth’s structure was different in the past compared to the present. It was drawn as an oval to fit every part of the Earth into the universe. These parts were all combined together to form a giant mass. In due course of time, these giant masses broke into smaller pieces which are now called as the continents of the World.

The Beginning Of Life On Earth:

Not accurately but can be predicted to some extent. It all started 3.5 billion years ago. The first life to place its foot on the Earth was on the sea. But the sea creatures were present although the past Earth had a number of poisonous gases present in the core of the atmosphere. The color of the sky was pink and sea was in a rusty-red state.

How Did Life Begin At First?

Rumours are spreading fast that the life suddenly hit the surface of the Earth when a lightning hit the sea. It sent a tremendous energy into the surface of the water and there came the first life in the Earth. This energy mixed all the chemicals in the sea. The life was able to grow because of the new amino acids that were created.

The First Living Beings:

Bacteria were the first living things that were created on the earth, prior to the sea living creatures. It was changed to algae, which were very simple plants. It lived in sea in masses, that is, it lived like huge covered blankets. They reacted with each other and made the most important gas for respiration (oxygen) which helped to turn the sky and sea into blue colour.

The Animals Which Lived In The Sea:

At first, for millions of years, life existed only in the seas. It was a home to a large variety of living beings like shellfish, worms, sponges and jelly fish. Backbones were absent for all the above mentioned animals.

The First Appearance Of Life On Land:

Nearly 440 million years ago was the first life that existed on the land surface of the Earth. It was nothing complicated but very simple. The first land animals were worms, spiders, scorpions and insects and they even evolved as they moved on to the land.