00:00The surface may be dry now.
00:03Its rivers long vanished, its lakes turned to dust.
00:08But Mars is a planet full of secrets, some carved into rock, others buried far beneath it.
00:15And not all the water, it seems, is gone.
00:20Because deep below the frozen crust, beyond the reach of dust storms and the icy grip of the Martian night,
00:28something stirs beneath the silence.
00:32Scientists have found clues.
00:36Signals picked up by orbiting spacecraft and radar instruments.
00:41Hints of liquid water, still flowing, still clinging to existence, underground.
00:48It may be trapped beneath layers of ice and salt, shielded from the bitter cold.
00:54These underground lakes, if confirmed, could resemble Earth's subglacial lakes in Antarctica.
01:01Isolated, ancient, and possibly habitable.
