Story perspectives

Study Reveals Mars Once Had Vast Ocean Covering One-Third

4/21/2026

Summary

Story summary

A new study suggests Mars once hosted an ocean covering about one-third of the planet billions of years ago.
The ocean signature appears as a broad 'coastal shelf' rather than traditional shorelines.
The shelf spans the northern lowlands and aligns with river valleys and sediment deposits.
Led by Michael Lamb and Abdallah Zaki, researchers urge Rosalind Franklin rover investigations to confirm findings and illuminate Mars' climate and potential for life.

History

Historical Context

NASA's Mars Reconnaissance Orbiter revealed evidence in 2015 suggesting that ancient water flows once covered a significant portion of Mars, possibly forming an ocean. This finding builds on earlier discoveries, such as the detection of minerals indicating past water presence by the Opportunity rover in 2004. Understanding Mars' water history is crucial for future exploration and the search for extraterrestrial life.

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Story summary

A new study suggests Mars once hosted an ocean covering about one-third of the planet billions of years ago.
The ocean signature appears as a broad 'coastal shelf' rather than traditional shorelines.
The shelf spans the northern lowlands and aligns with river valleys and sediment deposits.
Led by Michael Lamb and Abdallah Zaki, researchers urge Rosalind Franklin rover investigations to confirm findings and illuminate Mars' climate and potential for life.

1 / 2