Getting to Mars’ water could be even harder, even if it’s at just 5.4 km down as suggested in the new study, given the hellish environment and absence of local hardware stores. ® ...

A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly half the planet. The blue areas show the depth of the ocean filled to the shoreline level of the ancient ...

Visible on the planet itself is a dark patch near the top, marking the frigid northern polar cap, where temperatures dip to ...

The “Mars ocean theory” has long been the topic of discussion among scientists and cartographers due to Mars’s geography, which suggests a large northern ocean once existed on its surface.

The Mars ocean theory hatched in the 1970s after spacecraft imagery showed an apparent large shoreline and seabed-like indentation. Some scientists discounted the idea since the shore seemed irregular ...

A new study revealed that humans have "directly observed" less than 0.001% of the deep seafloor, despite the oceans covering over 70% of Earth's surface.

A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly half the planet. The blue areas show the depth of the ocean filled to the shoreline level of the ancient ...