GEOLOGY

Detailed explanation-1: -Some of the water molecules in your drinking glass were created more than 4.5 billion years ago, according to new research.

Detailed explanation-2: -A recent study estimated that there are water molecules on Earth that are up to 4.6 billion years old, which means they predate the formation of the Milky Way.

Detailed explanation-3: -Answer: The water molecules you drink today can be millions of years old because they were groundwater that has been exposed to the air and sun. Over time, the water molecules break down into smaller and smaller pieces. These small pieces are called molecules.

Detailed explanation-4: -The water on our Earth today is the same water that’s been here for nearly 5 billion years. So far, we haven’t managed to create any new water, and just a tiny fraction of our water has managed to escape out into space. The only thing that changes is the form that water takes as it travels through the water cycle.

Detailed explanation-5: -Earth’s water is 4.5 billion years old, just like the article’s title says. At least some of it is. According to the authors, planetesimals probably delivered it to Earth, but exactly how that happens isn’t clear.