A 19th century artifact from the Gulf of Papua, on display at the de Young Museum in San Francisco, California. While some might think it’s creepy, I think it’s an amazing work of art. Also can be viewed here.
Here’s a little glimpse of something I came across during my recent visit to the California Academy of Sciences. A Foucault pendulum is used to demonstrate the Earth’s rotation. Basically, the pendulum swings evenly, but the trajectory changes as the planet rotates. It may take a while, but eventually all those little blocks in the circle will be knocked down.
This week’s challenge is all about forces of nature, so I thought I’d post something about light and its effects of animals. Here’s another Exploratorium exhibit. Basically, zooplankton can distinguish different colors of light. In the ocean, it helps them swim toward the surface, where their food is located. Blue and green lights shine deeper in the water than the other colors, hence why the plankton are attracted to these ones; they think the sun is shining through the water, and that they’re entering the photic zone for a meal. Large version available here.