Rupert Till, University of Huddersfield, UK: “I will run audio testing software during this time, then emit sound waves to record the sound of the cave. We can find the relationship between sounds and figures. Even though these red dots are the first drawings, they resonate at low frequencies, proving that the cave space is very narrow and quiet. Dr seuss alphabet face mask. The first drawings may be on a small wall and only one person will be there alone.
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