Gelatin silver print, 7 1/2 x 9 1/2 in. (19.05 x 24.13 cm)
Have you seen these awesome thimble jellies (Linuche aquila) in the Jellies Experience?
Sometimes we import our jellies, and sometimes, well, we get lucky: these were grown from polyps that our clever aquarists discovered on rocks in our tropical exhibits.
The medusae (bell) of thimble jellies grow and harvest algae, called zooxanthellae, for sustenance. That’s brown coloration you see in the photos. In nature, these jellies collect in bunches at the surface. Their polyps live in long chitonous tubes, which is very different from the typical fixed jellyfish polyp.
But beware: Thimble jellies are also responsible for “sea bathers eruption” in tropical climes, such as the Caribbean. When the jellies spawn and their larvae form, they get stuck in skin or bathing suits, with unpleasant results!
Lava is rather fascinating as a fluid. Lava flow regimes range from extremely viscous creeping flows all the way to moderately turbulent channel flow. Lava itself also has a widely varying rheology, with its bulk properties like viscosity and its response to deformation changing strongly with temperature and composition. As lava cools, instabilities form in the fluid, causing the folding, coiling, branching, swirling, and fracturing associated with different types and classes of lava. (Image credit: E. Guddman, via Mirror)
In February 1935, a chimpanzee at London Zoo called Boo-Boo gave birth to a baby daughter. A couple of months later, a little blonde-haired girl was given a soft-toy replica of the zoo’s new arrival to mark her first birthday. This was Jane Goodall’s first recorded encounter with a chimp.