Inspired educator Kalogirou, and his harmonic oscillator made with straws #tedxthess @ Ολύμπιον… http://instagram.com/p/YCpyUDFOFR/
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Inspired educator Kalogirou, and his harmonic oscillator made with straws #tedxthess @ Ολύμπιον… http://instagram.com/p/YCpyUDFOFR/