Amazing video of a drop of water in super slow motion portrays surface tension

Well, these guys explain it way better than I could, so watch the video, even if you are familiarized with surface tension. The super slow-mo frames are absolutely wonderful !

Dutch University tests Air-purifying paving stones

Technology has developed so much in these years that scientists are finding more and more brilliant ways to clear out the pollution that fills our lungs and to solve problems that trouble the very existence of our mankind in ways that sometimes surprise all of us. Often, for the most complex issues we have to [...]