Fluorite And Baryte

Fuzzy Okenite -  Jalgaon, India

June 8th is World Oceans Day - a day to celebrate the oceans that connect and sustain all of us. Our colleagues at the Biodiversity Heritage Library have been leading up to today with a series of blog posts  exploring historic publications that mark important milestones in the progress of marine bioscience research and ocean exploration.

Top image: Whale shark from  Illustrations of the zoology of South Africa… v.4 (1845) Middle top : radiolarians and jellyfish from Ernst Haeckle’s Kunstformen der Natur (1904) Middle bottom: giant squid from Cassell’s Natural History v.5-6 and cuttlefish from  Voyage de la corvette l'Astrolabe Mollusques and Zoophytes Atlas (1833) Bottom: deep sea fish from  Valdivia Expedition…1898-1899. Bd. 15, T. 1

Double triangle sawtooth by Miguel Angel Blanco Muñoz. I have liked how time seemed to slow down, folding the grid.

Im Rahmen des TV Pop-Ups haben Gert-Jan Akerboom und Hannah Reber eine multimediale Installation gebaut. Der Bauplan wird von Gert-Jan Akerboom als Kunstwerk im Rahmen der CGG Berlin aus- und zur Verfügung gestellt. Viel Spaß beim Bauen! :*

more infos? ask presse@cgg-berlin.de

In slow motion, vortex rings can be truly stunning. This video shows two bubble rings underwater as they interact with one another. Upon approach, the two low-pressure vortex cores link up in what’s known as vortex reconnection. Note how the vortex rings split and reconnect in two places – not one. According to Helmholtz’s second theorem a vortex cannot end in a fluid–it must form a closed path (or end at a boundary); that’s why both sides come apart and together this way. After reconnection, waves ripple back and forth along the distorted vortex ring; these are known as Kelvin waves. Some of those perturbations bring two sides of the enlarged vortex ring too close to one another, causing a second vortex reconnection, which pinches off a smaller vortex ring. (Image source: A. Lawrence; submitted by Kam-Yung Soh)

Note: As with many viral images, locating a true source for this video is difficult. So far the closest to an original source I’ve found is the Instagram post linked above. If you know the original source, please let me know so that I can update the credit accordingly. Thanks!

Moss Green Halite

Locality:  Sieroszowice Mine, Lower Silesia, Poland

Watching the clouds go by on #Mars. Check out these atmospheric ripples!

http://<iframe src="https//player.vimeo.com/video/157414762" width="640" height="360" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>