Scientifically, turtles are said to stack in order to be closer to the sun for warmth, since ideal basking spots may be scarce. Also, it might be a defense against predators, to make themselves look larger. This turtle duo looks like a two headed monster, and of course two heads […]
Monthly Archives: October 2019
4 posts
Many birds are colorful, but few can rival hummingbirds. The colors are from both pigment in the plumage, and also structural, with prism-like cells in the top layers of the feathers. Looking closely at hummingbird feathers, the surface has layers of air bubbles. When light strikes, some goes straight through […]
Sloths have an unfair reputation for being lazy, since their lifestyle is based on physiology and not lack of motivation. They have a low metabolic rate, less than half what would be expected for their body size. They partly control their temperature by sunning themselves, like cold blooded animals. They […]
I recently returned from another visit to Costa Rica, a country I have visited so often that it is like being with an old friend, both exciting and relaxing. My first visits many years ago were to study monkeys and rainforests, so it felt familiar to spend time watching and […]