Marine Bio
Get flash to fully experience Pearltrees
Who knew red tide caused blue waves? San Diego's beaches are captivating many with an eerie nighttime phenomenon. It seems that "red tide" is causing bioluminescent glow-in-the-dark waves in the area, a sight that's almost too eerie to believe.
Red Tide Causes Glow-In-The-Dark Blue Waves On San Diego Beaches (VIDEOS)
Nature by numbers. The theory behind this movie
We can find interactive sites on the internet (like this ) to draw points, move them, and check how the structure becomes updated in real time. In fact, if we have a series of random dots scattered in the plane, the best way of finding the correct Voronoi Telesación for this set is using the Delaunay triangulation. And in fact, this is precisely the idea shown on the animation: first the Delaunay Triangulation and then, subsequently, the Voronoi Tessellation . But to draw a correct Delaunay Triangulation is necessary to meet the so-called “Delaunay Condition”. This means that: a network of triangles could be considered Delaunay Triangulation if all circumcircles of all triangles of the network are “empty”. Notice that actually, given a certain number of points in the plane there is no single way to draw triangles, there are many.
Leaf-like sea slug feeds on light - Technology & Science
A green sea slug found off North America's east coast not only looks like a leaf, but can also make food out of sunlight, just like a plant. The solar-powered sea slug Elysia chlorotica can live entirely from energy from the sun. It's about three centimetres long.
