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Nearly 3.4 billion years ago, there were microscopic bacteria, which are considered to be the earliest form of living organisms on earth. Because the earth's atmosphere did not have any oxygen at that time, these organisms survived by feeding on sulfur.
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∙ 9y ago
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∙ 12y agoTwo- Billion years ago, Earth started to form liquids like water and Oxygen. The Animals: Eukaryote cells, cells with internal organs, came into being. The plants: different lines of ages of eukaryotic cells aquired chloroplasts on at least three seperate occasions and one of the resulting cell lines went on to evolve into all green algae and green plants.
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∙ 13y agoThe Earth was mostly covered by oceans, the oldest rocks had formed, and the planet was still being bombarded by objects from space. The earliest life forms may have come into existence by this time, but would have been single celled. No life, plant or animal, would have been visible by the unaided eye. Very little atmospheric oxygen would have existed, certainly not enough to support the abundance of plant and animal life that exists today. Earth would be much hotter and no ozone shield would exist to screen out the sun's harmful radiation. Not a very inviting place.
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∙ 13y agoDifficult to know for sure. There was nobody around to take notes, and that was even before the BETA tape format was developed.
Some things we can say with certainty; there were rainstorms, and lightning, and the Sun rose and set, and there were earthquakes and volcanoes.
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∙ 13y agoDifficult to know for sure. The Sun was still new, the Earth was probably still mostly molten, and the Earth was being pummeled by a rain of asteroids and space rocks. There was no life on Earth yet, of course. Probably no atmosphere either.
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∙ 13y ago5 billion years ago there was no Earth. It formed approximately 4.567 billion years ago.
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∙ 11y agoAs far as we can determine, the Earth is only four and a half billion years old, so five billion years ago, there was no Earth, just an interstellar dust cloud.
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∙ 15y agoEarth's atmosphere did not exist; that was around the time of its formation.
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∙ 13y agoThe Earth's atmophere had started to form, however was not complete and contained posinous gases. Hope this helps
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∙ 12y agoWhy ask a question that can not be answered? No on could possibly know for sure what happend on earth 2 billion years ago unless they had a time machine.
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Universe began 15 billion years ago with huge explosion called?
The Big Bang
What was the climate 100 billion years ago?
I feel pretty confident in stating here that there was no climate to gauge if one takes into account that there was no 100 billion years ago, as it would've been before the big bang (13-15 billion yrs ago) which we now consider is when time began.
Why is an object 15 million light years away like looking at an object 15 million years ago?
Because you might have seen it in a telescope years ago idkAnother AnswerA light year is a measure of distance. If an object is 15 million light years away, the light you are looking at in this moment was produced 15 million years ago. If a star that far away went supernova at this moment, we wouldn't know it for another 15 million years.The light we see on the surface of our planet from the Sun is a little over 8 minutes old, because it took that light about 8 minutes to travel from the Sun to Earth.
How can the universe be only some 14 billion years old when it can be contemplated that it could be 20 or 30 or more billions of years old?
The universe is actually about 15 billion years old. I'm not sure where you got the statistic that the Hubble Space Telescope can see 20 billion light years into space; I think you're off by a factor of three or so.
What will the sun be when its 15 billion years old?
Either a very cool white dwarf or possibly a black dwarf. [See related questions]
When did the first galaxies and stars develop?
About 13-14 billion years ago. Cosmologists are not in agreement as to what happened the first few million or billion years, but most agree that the age of our Universe is about 15 billion years.
What happened 15 years ago?
An accident. And that accident was you.
How long ago did the original cloud of dust and gas start collapsing?
15 billion years ago
How it all began 15 billion years ago?
i dont know :( :( :( :( :( :( :( :( :( :( :O
What was the year of the big bang?
It was about 15 billion years ago. Nobody was around back then to number the years.
What created the univer se?
The explosion of the Big Bang about 15 billion years ago.
The universe began about?
13-15 billion years ago through the big bang.
Universe began 15 billion years ago with huge explosion called?
The Big Bang
Evidence suggests the universe dgan about 15 billion years ago in a?
Earth was created by the Christian God, the true God, around 6,000 years ago
Where does the evidence suggest that the universe began 15 billion years ago?
Religious materials suggest to some that the universe is about 6 thousand years old. The 15 billion year estimate comes from the backward extrapolation of movement of the outward moving galaxies. It is theorized that this outward movement most have started about 15 billion years ago, if currently understood distances and velocities are worked backwards.
Ten years ago astronomers found a galaxy that you know is 8 billuon light years away If the universe were now 15 billion yrs old when would the galaxy have emitted the light you observed?
8 billion years ago.
What was the climate 100 billion years ago?
I feel pretty confident in stating here that there was no climate to gauge if one takes into account that there was no 100 billion years ago, as it would've been before the big bang (13-15 billion yrs ago) which we now consider is when time began.
