Middle school project discovers cave skylight on Mars | ASU News<p>They went looking for lava tubes on Mars — and found what may be a hole in the roof of a Martian cave.</p><separator></separator><p>The 16 students in Dennis Mitchell's 7th-grade science class at Evergreen Middle School in Cottonwood, Calif., chose to study lava tubes, a common volcanic feature on Earth and Mars. It was their class project for the <a href="http://msip.asu.edu">Mars Student Imag
