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How long were prokaryotes the only organism on earth?
2 Billion years
What happened 65.5 billion years ago?
the asteroid hit earth and it blasted tonnes of mud and dust into the atmosphere and that blocked out the sun wich killed the plants and then the herbivores had nothing to eat so they died then the carnivores had nothing to eat after they died so all the animals got wiped out
Is earth 5 billion years old?
It's really just four and a half billion years old according to the most recent measurements by geologists. The entire universe is about 13.7 Billion years old.
What has existed for at least 3 million years?
The universe has existed for more than 14 billion years, the sun for more than 4 billion years - both well over 3 million years.
How long would it take to use up 1000 billion tons of coal if worldwide consumption was 4.5 billion tons per year?
1000 billion / 4.5 billion = 1000/4.5 = 222.22... years.
What is the age of earth in billion years?
Depends how roughly you want it. It is generally accepted in the science community that the Earth is 4.54 billion years old.
What happened to the earth 700 billion years ago?
Earth did not exist 700 billion years ago, nor did the universe. Earth is about 4.6 billion years old.
When do we believe the big bang happened?
Approximately 13.8 billion years ago.
How old it the Earth?
In science class I learned that earth is approximately 4.6 billion years old.
What happened to Big Star?
IT will burn out after 50 billion years!
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 year was it when the big bang happened?
That is estimated to have happened something like 14 billion years ago.
How long ago was our solar system formed?
Sciences say that the sun was formed 4,600,000 years ago
What happened 3.8 billion year ago?
About 3.8 billion years is about the age of the oldest firm evidence of life on Earth.
How Earth formed about years ago?
The present best estimate is 4.6 billion years.
What happened 3.8 years ago?
About 3.8 billion years is about the age of the oldest firm evidence of life on Earth.
According to the big bang hypothesis what happened 20 billion years ago?
The universe did not exist that long ago. The universe as we know it is only 13.7 billion years old.
