Here’s a nice, close shot of one of the more interesting inhabitants of the aquarium at the California Academy of Sciences in San Francisco. The patterns on Chambered Nautilus’ shells are some of the most famous in the animal kingdom. Larger version is viewable here.
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.
There’s more to your favorite pearl necklace than you think…SciShow breaks it down.