Back to today’s briefing

Story perspectives

NASA Discovers Ancient Lake Remnants on Sahara Volcano

8/23/2025

30 7

Summary

Story summary

NASA astronauts found white salt deposits on Chad's Emi Koussi volcano, initially thought to be snow.
The deposits are remnants of an ancient lake, suggesting the Sahara was once a verdant region.
Satellite images show geological features from the "Green Sahara" era, highlighting past climatic shifts.
This study improves knowledge of climate variability and the Sahara's evolution into a desert.

1 of 1

Story summary

NASA astronauts found white salt deposits on Chad's Emi Koussi volcano, initially thought to be snow.
The deposits are remnants of an ancient lake, suggesting the Sahara was once a verdant region.
Satellite images show geological features from the "Green Sahara" era, highlighting past climatic shifts.
This study improves knowledge of climate variability and the Sahara's evolution into a desert.