Through the intricate study of lava tubes—caves formed following volcanic eruptions when lava cools down—an international team of researchers has uncovered clues about Earth’s ancient environments that could be significant in the search for life on Mars. Through the intricate study of lava tubes—caves formed following volcanic eruptions when lava cools down—an international team of researchers has uncovered clues about Earth’s ancient environments that could be significant in the search for life on Mars. Astrobiology Planetary Sciences Phys.org – latest science and technology news stories