A rare 16th century gold sundial and compass ring, possibly German,
A rare 16th century gold sundial and compass ring, possibly German, circa 1570 The hinged oval bezel designed as a seal and engraved with a coat of arms, opening to reveal a sundial and compass, on a plain gold hoop, dimensions of bezel 1.8x2.0cm
Quadrant astrolabe, circa 1325 A.D. This rare instrument-only seven dating from medieval times are known to exist-combines the features of a quadrant and an astrolabe. Essentially, the circular face of an astrolabe has been "folded over" twice to create a quarter-circle. This instrument could serve as a measuring tool and perform many of an astrolabe's calculation functions as well.
2010 Travel Diary #23: Turtle, Phoenix and Seal | London Korean Links
STAR GATES: Nestling on the slopes of Wangsan, one of the peaks in the Jirisan region (Korea), is a giant weighing 127 tonnes. Its carved with ornate designs. It rests flat against the mountainside, and is said to be one of the strongest sources of ki anywhere. Rest your hands on the rock for a minute, and you will benefit from that energy.
Twinkle-Twinkle In The Sea
This is a bioluminescent plankton. They cause seawater to fluoresce. They glow because of the luciferins in their body. The light is produced by a series of oxidation reactions set off by a catalyst called luciferase. The interesting part is, they glow when they are agitated, or when they sense perturbation in their surrounding. For example when a squid swims it induces current which agitates the plankton, and thus they glow.