Establishing Martian colonies will have to wait until scientists develop a method to access this crucial resource.

This depth makes it challenging to access, even with advanced drilling technology.

Igneous rocks, formed from cooled magma, are analogous to the granite found in the Sierra Nevada.

Scientists uncover large liquid water reservoir deep in Mars' crust

The discovery sheds light on Mars' geological history and the fate of its once-abundant surface water.

However, after Mars lost its atmosphere, these resources vanished.

It had been believed that much of the water had escaped into space.

All of this raises intriguing possibilities in the search for extraterrestrial life on Mars.

“Without liquid water, you don’t have life,” said Manga.