The History Of Universe

Our universe was created about 13.8 billion years ago in the big Bang .

At first it was very simple consisting of little more then hydrogen and helium and lots of energy there were no stars or glaxies no planets and certainly no living creatures then gradually more complex things appeared

The first stars and galaxies probably appeared within about 200 million years of the Big Bang.

As big stars lived and died,they blew up and created new elements.

Those new elements allowed the creation of new materials such as the dust and ice rocks and minerals from which planets are made

Our sun and solar system appeard about 4.5 billion years ago.

And by 4 billion years ago,its likely that life had emerged on Earth.

Life evolved and diversified but most of it consisted of tiny single celled organisms

Unit about 1 billion years ago ,the first many celled organism appeared..

From about five hundred million years ago big creatures become much more common from trilobites to trees to tyrannosaurus rex

The first humans evolved every recently just about 200,000 years ago

Thought it wasn't abvious at the time .

The appearance of humans turned out to be hugely important because humans were able to share ideas and information better than other species that ever existed...

Using that ability our ancestors gradually built up stores of information that allowed them to control their environments more and more powerfuly

The process accelerated unit in just the last 100 years.

We have become so powerful that what we do in the next few decades will determine future of the oceans.

The climate and of most other species on Earth including our own descendants many scholars believe that this representa a new geological epoch

The Antheropocene in the last 50 years we humans have begun to control energy and resources on such a vast scale that we are transferming the land...

The seas and the atmosphere of the Earth so,planets Earth is at a turning point in its history humans now the dominant species will either lead the biosphere towards a flourishing future

Or to catastrophe perhaps triggered by nuclear wars that could ruin swathes of the planet in just a few hours or caused more slowly by the countinued release of greenhouse gases until the land is flooded and global climates are too hot to grow enough food.

Never before has a single species

Determined the future of the entire biosphere the good news is that we understand the science and we already have many of the technologies needed to build a sustainable future what's missing now is the political technology .

How can governments and peoples be encouraged to see the challenges that they all share rather than simply defending their own local and immediate interests??

Only by collaboration can we avoid the many dangers we face today Can we steer planet Earth towards a prosperous future in which human and all the other organisms on which we depend can flourish for thousend even perhaps for millions of years into the future?