I don't know, but scientist know.
Penis
so they know what's going on in the world
The Iceman, Is About 5,300 years old according to what the scientists know and what they have figured out.
Satellites
Their parents probably would have told them when they were born, and most scientists have a birth certificate that has recorded their date of birth.
By carbon dating minerals, fossils or objects, in the earth.
No one knows how much time it took to create the world and even scientists can not be 100% sure how old it is.
Yeah because scientists from all around the world had expreinced it
This is a trick question that will be difficult to have an accurate answer. First of all, to quantify as "most", one must know "ALL". I believe no one in the world can know all computer scientists. By the time one gather /count the number of them, new and old comes and goes.... Next, what exactly the definition of being a computer scientist.
A million? The age is over 4 billion years.
Usually scientists use carbon dating to find out the age of a material.
The nMoon was once a part of the Earth, so it is the same age as the earth.