At least, that's what astronomers might say after the class's discovery of an opening into a cave on the Red Planet.
The science class from Evergreen Middle School of Cottonwood, Calif., found the opening while working on a research project with the Mars Space Flight Facility run out of Arizona State University.
Using a camera orbiting Mars, the students focused on the area around the planet's Pavonis Mons volcano. The only other similar opening near the volcano was found in 2007, when Glen Cushing, a scientist with the U.S. Geological Survey, published a research paper on the surface anomalies.
"This pit is certainly new to us," Cushing told the students, according to a release from the university. He estimated the opening to be 620 feet by 520 feet and the hole to be at least 380 feet deep.