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What happens if you keep digging? What lies beneath the countless grains of sand on a beach or in a desert? Is it just more sand, or is there something more? What makes beach sand different from desert sand, and how do these tiny grains come to be? Beneath the Sahara Desert, could there be remnants of a time when it was not a desert at all? And what could a prehistoric mega lake tell us about the Earth's past? Join us as we dig deep into these questions, uncovering the surprising and complex world beneath the sand. From the formation of sand to the secrets of the Sahara, we'll explore how our planet's landscapes are not static, but constantly changing and evolving over time.

Reference:
"Remnants of an Ancient Lake." 2019. NASA Earth Observatory. Accessed July 14, 2023. https://earthobservatory.nasa.gov/ima....

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