@sciencefunn: For one thing, despite being solid, it's less dense than liquid water. And for another, it's been known to make some rather jarring noises. Skip a stone across a frozen lake and you might hear a high-pitched sound that's both familiar and otherworldly. It's like the chirp of an exotic bird. Why does it happen you ask? When a sound wave passes through a solid medium (like ice), those high and low frequencies get separated. Being faster, the high-frequency wavelengths zip ahead of their low-frequency counterparts. As a result, you may hear a gap between the high notes and the low notes contained within the same sound. That's acoustic dispersion in a nutshell. Check out @sciencefunn for more science and daily facts. Video credit: @smpfilms (YouTube) LiveEach Day #Science #physics #interesting #facts