Fluid dynamics in action. Imagine if Froude had witnessed this! |BBC
I’ve just been reading a fantastic book about penguins. Smithsonian Q&A Penguins by Lloyd Spencer Davis has everything I’ve been wondering about. It’s written in accessible language. It’s also fun to read. I’ve read a lot about marine mammals, and I was wishing there was a similar volume that included penguins. The best I could […]
National Geographic has a terrific device known as the Crittercam. The penguin on the left is wearing one. He’s not the only animal that has. It’s been worn by a variety of animals, including humpback whales and a bear cub. The idea for the Crittercam came to marine biologist and filmmaker Greg Marshall in 1986. […]
This is the first post in a series on jellyfish. It explores the way jellyfish move through deep water. Sometimes it appears that jellyfish simply float and move with the water in the waves. Other times it seems that the wind blowing across the surface of the water is pushing the jellyfish along the surface.
Let’s look at caterpillars as an example of camouflage. The objective of the caterpillars in our scenario is to make it to adulthood so that they can lay eggs. We have three types of caterpillars. One type has spots, another is multi-colored, and the third is a solid color. The only predator of these caterpillars is a species of bird that lives in the region for twelve months of the year. These birds aren’t picky, they’ll eat any caterpillar they can find.
Take butterflies as an example. The objective of the butterflies in our scenario is to survive long enough to lay eggs. We have three types of butterflies. One type is bright blue with emerald green spots, another is multi-colored, and the third is a solid color. The only predator of these butterflies is a species of lizard that lives in the region for twelve months of the year. These lizards aren’t picky; they’ll eat any butterfly they can find.
A summer nature journal is the perfect way to sharpen your observation skills while keeping your writing sharp. The only thing you need is a journal and a project. How about micro terrarium? They’re easy to make and fun to observe. All you need is a small container, some small plants like clover from the […]
>According to the CritterZone, the snapping turtle (Chelydra serpentina) is the largest type of freshwater turtle in the United States. They have an upper shell that is not large enough for them to withdraw inside completely. They have large nails on all four feet and a “long, fleshy tail, with an alligator-like crest.” Their powerful […]