Photo: Mars Once Had Oceans, New Evidence Suggests



An artist's reconstruction shows Mars as it might have looked more than two billion years ago, with a massive ocean filling a basin that now lies in the planet's north.

Evidence for the ocean that had previously been discounted because of strange surface features shouldn't be discounted, suggest scientists who have developed a new theory about Mars's shifting poles.

Image courtesy Tyler Perron/Nature


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.