Both comets and asteroids can contain ice. And if, by colliding with Earth, they added the amount of material some scientists suspect, such bodies could easily have delivered oceans' worth of water. Accordingly, each has been fingered as a suspect in the mystery.
Consequently, how old are the world's oceans?
The ocean formed billions of years ago. Over vast periods of time, our primitive oceans formed. Water remained a gas until the Earth cooled below 212 degrees Fahrenheit . At this time, about 3.8 billion years ago, the water condensed into rain which filled the basins that are now our oceans.
How old is our drinking water?
A fascinating new study suggests that some of the water molecules we drink and bathe in are way old — as in more than 4.6 billion years old.
How old is the sun and when will it die?
14 Things You Didn't Know About How the Sun Will Die. At some 4.6 billion years old, the Sun is about halfway through its life. In another 5 billion years it will be a normal “adult” star no more.