Overview
Can a light aircraft crash due to low air density? What's the longest undersea tunnel a human can negotiate with no tanks? And how deep can a free-diver go? And hear some amazing examples of a sonic boom.
Can a light aircraft crash due to low air density? What's the longest undersea tunnel a human can negotiate with no tanks? And how deep can a free-diver go? And hear some amazing examples of a sonic boom.
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