Wild Things: Life as We Know It
Snakes: Masters of Motion
Have you ever wondered how snakes slither across the ground? Scientists used to believe that snakes pushed against rocks and branches to move forward. However, a recent study has revealed that the secret lies in their scales. The belly scales of snakes are oriented in such a way that they can snag on irregularities in the ground. By pushing parts of their belly down to take advantage of this friction, snakes can generate enough leverage to propel themselves forward.
Avian Warning System
Siberian jays are known for their loud screeching calls. Researchers have discovered that these calls are not simply panic reactions. In fact, Siberian jays use over 25 different calls, each with a specific meaning. These calls can convey information about the type of predator nearby (hawk or owl), the level of risk it poses, and whether or not nearby jays are related.
Snow Roots: A Unique Plant Adaptation
In the Caucasus Mountains, scientists have discovered a previously unknown type of plant structure called “snow roots.” These roots weave their way through the snowpack, absorbing nitrogen that is trapped in the snow. This gives snow root plants a head start on the brief growing season in their harsh environment.
The Origins of Laughter
When did humans start laughing? To find out, researchers tickled young humans, chimps, bonobos, orangutans, and gorillas. The sounds that these great apes made were so similar that the study concluded that the origins of human laughter can be traced back at least 10 to 16 million years, to our common ancestor.
The Domestic Dog’s Guilty Look
Have you ever noticed that your dog gives you a “guilty look” when you scold them? According to a study by psychologist Alexandra Horowitz, this look is not a reaction to whatever the dog did, but rather to their owner’s scolding. Dogs give the guilty look even when they are completely innocent, suggesting that it is a conditioned response rather than an indication of guilt.
Additional Information
For more information on the fascinating topics covered in this article, please visit the following resources:
- Siberian jays: Encyclopedia of Life
- Great apes: Encyclopedia of Life
- Domestic dogs: Encyclopedia of Life