What could it be?
It’s possible the announcement relates to water ice around the moon’s south pole, considered a possible future resource for astronauts on the moon. Scientists have also predicted that – beneath the surfaces of Mars, Venus and our own moon – there are majestic volcanic caves, or lava tubes, formed by flowing magma and covered in tiny crystals. These lunar caves could provide shelter for future lunar explorers, and NASA has been testing an exploratory cave rover toward that end.