Unearthing Secrets of the Past (Full Episode) | Drain the Oceans | National Geographic

3 Ways to Explore Cave of the Winds: From Easy to CHALLENGE

In July 1962, French geologist and cave explorer Michel Siffre entered the Scarasson chasm in the Alps and remained underground for approximately 63 days. He deliberately removed clocks, calendars, sunlight, and ordinary time cues so he could study his body’s natural sleep-and-wake rhythm. Siffre communicated with a surface team when he woke, ate, and slept, but they did not reveal the time to him. As the experiment continued, his schedule drifted and his perception of short intervals became inc

Earth to Ellora: Uncovering India’s 1,500-Year-Old Rock-Cut Wonder 🌍 #shorts

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This ancient Indian cave is flatter than machine-polished marble #ancienttechnology #india #shorts