how did life originate on earth

The chemistry of life may have begun shortly after the big bang 13 8 billion years ago during a habitable epoch when the universe was only 10 17 million years old. Some scientists believe that the life came from outerspace. In order to understand how the universe has changed from its initial simple state following the big bang only cooling elementary particles like protons and electrons into the magnificent universe we see as we look at the night sky we must understand how stars galaxies and planets are formed.
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Not long after that rock record begins tantalizing evidence of life emerges. First multicellular life and see how ancient earth did look like then. We interacted with local archaic human populations as we colonised the globe.

These discoveries include the wide diversity of life near sea floor hydrother mal vent systems where some.

How did life originate on earth. Most potentially habitable exoplanets are at least hundreds of light years away but wolf 1061c is just next door. Earth is about 4 5 billion years old but the oldest rocks still in existence date back to just 4 billion years ago. Our species homo sapiens has now spread to all parts of the world but it s generally believed that we originated in africa by about 200 000 years ago. According to the panspermia hypothesis microscopic life distributed by meteoroids asteroids and other small solar system bodies may exist throughout the universe.

Life appeared 500 million years after the formation of earth i e almost four billion years back. The first non cellular forms of life could have originated 3 billion years back. How did we get here. Marine life or sea life or ocean life is the plants animals and other organisms that live in the salt water of the sea or ocean or the brackish water of coastal estuaries at a fundamental level marine life affects the nature of the planet.

Microbial life forms have been discovered on earth that can survive and even thrive at extremes of high and low temperature and pressure and in conditions of acidity salinity alkalinity and concentrations of heavy metals that would have been regarded as lethal just a few years ago. Marine organisms mostly microorganisms produce oxygen and sequester carbon shorelines are in part shaped and protected by marine life and some. I stumbled upon an amazing web page showing what did ancient earth look like. The practice originated during the middle ages.

When and where did our species originate. 600 million years ago or jump to a particular event i e. As earth cooled the water vapor fell as rain to fill all the depressions and form oceans. Nonetheless earth is the only place in the universe known.

Originate definition to take its origin or rise. This is the closest planet yet that could support life beyond our solar system.