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91
General Science / Ultra-Sound explodes water in ...
Last post by Unbeliever - April 03, 2019, 02:45:24 pm


Quotereally wasn't expecting this at all! I just wanted a quick cute fun video for the weekend.  In the end, I was stunned by what I found!


https://www.youtube.com/watch?v=2qJPUM4XaGA
93
Astronomy/Cosmology / World's sharpest Tele lens! Mo...
Last post by Unbeliever - March 30, 2019, 04:14:04 pm

QuoteWorld's sharpest super telephoto lens?
The video clips where filmed in August 2015 at only 290m above sea level. (Camping side in Germany)
Some zooming in and out, and spinning in post production with Magix VDL 2016. 
Panasonic GH4 and a modified Leica 2.8/400mm + 1.4x + 2x + 2x Leica Apo Extender. 
I wanted make the viewer, to feel like observing the moon from a space craft.
I made some test with a "Siemens Star" this summer, resolution = 1mm at 480m (0.43 arcsec.) !! This means 1200 lines/mm, of course wide open!




https://www.youtube.com/watch?v=DCfDMU92JqI

94
Mathematics / Chaos, by Rudy Rucker
Last post by Unbeliever - March 30, 2019, 03:20:48 pm

QuoteThis is a video made by Rudy Rucker to demonstrate the 1990Autodesk program, "James Gleock's CHAOS: the Software."  The program was written by Rudy Rucker, Josh Gordon, and John Walker.  Topics include dynamical systems, strange attractors, Mandelbrot set fractals (inclucinbz a 4D cubic version), cellular automata, and fractal landscapes.



https://www.youtube.com/watch?v=ICrNOTQBS8U
95
Astronomy/Cosmology / Where did the Moon come from? ...
Last post by Unbeliever - March 27, 2019, 11:30:24 am

QuoteThe Earth and Moon are like identical twins, made up of the exact same materials -- which is really strange, since no other celestial bodies we know of share this kind of chemical relationship. What's responsible for this special connection? Looking for an answer, planetary scientist and MacArthur "Genius" Sarah T. Stewart discovered a new kind of astronomical object -- a synestia -- and a new way to solve the mystery of the Moon's origin.


https://www.youtube.com/watch?v=7uRPPaYuu44


Study reckons moon came from Earth during synestia:
https://www.youtube.com/watch?v=GoCX5Kpz0hg



https://en.wikipedia.org/wiki/Synestia


SYNESTIA - New Donut Shaped Planetary Object:
https://www.youtube.com/watch?v=FfTVt3O5V9g
96
Biology / Smart Animals Compilation
Last post by Unbeliever - March 25, 2019, 06:01:38 pm

QuoteFeeling secure in your human intelligence? Watch these animals show off their brains by solving problems. Who's really in charge?



Some of these animals are pretty amazing!


https://www.youtube.com/watch?v=Q6RakWBBcF4
97
Technology / Drilling Square Holes
Last post by Unbeliever - March 25, 2019, 01:59:03 pm

QuoteUsing a special drill and holder to drill square holes in material on a drill press.


https://www.youtube.com/watch?v=rjckF0-VeGI

98
General Science / No One Can Explain These Arcti...
Last post by Unbeliever - March 25, 2019, 01:21:59 pm


QuoteWhat's the deal with these strange arctic holes that not even NASA can explain?


https://www.youtube.com/watch?v=bpfrdzmgQyM
99
General Science / 173 Kiloton Explosion Over Ber...
Last post by Unbeliever - March 23, 2019, 05:08:21 pm

QuoteAlmost nobody noticed this, but back in December a chunk of space rock slammed into the Earth's atmosphere at 32km/sec over the Bering sea. The aerodynamic forces tore it apart and it released energy equivalent to a 170 kiloton weapon.

And almost nobody noticed.




https://www.youtube.com/watch?v=fpaxvjFh-qA
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