Everybody hates printers! Watch one get satisfyingly decimated by a pound of thermite! ... https://www.youtube.com/watch?v=hMvlkYDV1ho

Episode 2 of my series on water ice! Admittedly this is probably the least interesting because it's some negative results, but it's not very scientific to only discuss successes right? In this video, I use a lens to melt ice from the inside out, exposing it's polycrystalline structure (and explain how it's different from a single crystal). With this partially-melted ice, I can do a bit of materials forensics, and actually figure out how it formed, hopefully so I can improve the process in the future! Next video will be on vapor growth, and I'll say right now that it DOES work to grow centimeters-big faceted single crystals! Subscribe to make sure you see it! CORRECTIONS: [none yet!] Other videos in this series: The Sound of Freezing, Explained! https://youtu.be/Wd_c0A8u3lw The Sound of Freezing (Bonus Footage) https://youtu.be/hpzutKRSukw What is polycrystalline water? https://youtu.be/g7ONBuVtz-w Check out the other social media for updates and ramblings: https://www.facebook.com/AlphaPhoenixChannel/ https://twitter.com/Alpha__Phoenix Interesting articles for the extra-curious: J.M. Adams, W. Lewis, The Production of Large Single Crystals of Ice, Rev. Sci. Instrum. 5 (1934) 400–402. doi:10.1063/1.1751759. T. Shichiri, Faceted ice crystals grown in water without air, J. Cryst. Growth. 187 (1998) 133–137. doi:10.1016/S0022-0248(97)00839-7. P. Bisson, H. Groenzin, I.L. Barnett, M.J. Shultz, High yield, single crystal ice via the Bridgman method, Rev. Sci. Instrum. 87 (2016) 034103. doi:10.1063/1.4944481. A. Cahoon, M. Maruyama, J.S. Wettlaufer, Growth-Melt Asymmetry in Crystals and Twelve-Sided Snowflakes, Phys. Rev. Lett. 96 (2006) 255502. doi:10.1103/PhysRevLett.96.255502. T. Gonda, The Growth of Small Ice Crystals in Gases of High and Low Pressures, C, J. Meteorol. Soc. Japan. Ser. II. 55 (1977) 142–146. doi:10.2151/jmsj1965.55.1_142. Y. Furukawa, S. Kohata, Temperature dependence of the growth form of negative crystal in an ice single crystal and evaporation kinetics for its surfaces, J. Cryst. Growth. 129 (1993) 571–581. doi:10.1016/0022-0248(93)90493-G. N.N. Khusnatdinov, V.F. Petrenko, Fast-growth technique for ice single crystals, J. Cryst. Growth. 163 (1996) 420–425. doi:10.1016/0022-0248(95)00980-9. D. v. d. S. Roos, Rapid Production of Single Crystals of Ice, J. Glaciol. 14 (1975) 325–328. doi:10.3189/s0022143000021808. #Materials #Physics #Crystals Music and images in this video: I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/) http://ccmixter.org/files/grapes/16626 https://en.wikipedia.org/wiki/Bridgman%E2%80%93Stockbarger_method#/media/File:Bridgman-Stockbarger-Technique.svg https://en.wikipedia.org/wiki/Snowflake#/media/File:Snowflake_macro_ ... https://www.youtube.com/watch?v=g7ONBuVtz-w

The stars in the sky appear to move in arcs overhead, but it's actually the Earth that is spinning. They look like they're doing loops around Polaris, the north star, because it lies on the axis of Earth's rotation. If you point a camera at Polaris and spin it at the same rate as the sky turns (in the opposite direction), you can halt the rotation of the stars! My first semi-sucessful attempt at this timelapse was taken through my window in Santa Barbara, where the sky (and the glass) are none too clear. Over break, I had the chance to visit a real middle-of nowhere dark sky site with power available - home in North Carolina! The building in the timelapse is my dad's observatory, and you can see the roof roll off and light up red when he goes out to observe. While I was home, there was one night where the temperature was predicted to stay above dew point, so I set up the camera! Explanation of the Astronomy: https://www.youtube.com/watch?v=BBU4mQP1Y3Y Explanation of the Photography: https://www.youtube.com/watch?v=JBizFlGmLPM&t=775s First (published) attempt in Santa Barbara: https://www.youtube.com/watch?v=NpI4WQCTe8U This video (without me in it) - Fixed camera: https://www.youtube.com/watch?v=LTfSu60TnMY - Star-Stabilized: https://www.youtube.com/watch?v=btQFD3_TLAE In this video: I dunno grapes Creative Commons: Attribution http://ccmixter.org/files/grapes/16626 I Found an Answer by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://www.twinmusicom.org/ ... https://www.youtube.com/watch?v=SYcKaBzr87g

Thanks to all my subscribers! Starting with a 3D printed PLA play button, I'll be making a play button out of a new material every time my subscriber count doubles. Leave a comment to suggest materials for 2048! Music in this video: I dunno by grapes, is licensed under a Creative Commons: Attribution License (https://creativecommons.org/licenses/by/4.0/) Source: http://ccmixter.org/files/grapes/16626 Acid Jazz by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: https://freemusicarchive.org/music/Kevin_MacLeod/Jazz_Sampler/AcidJazz_1430 Artist: http://incompetech.com/ ... https://www.youtube.com/watch?v=__esCNRIFFI