Stepping on snakes for science, and crows that count out loud
May 23, 2024
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Diana Liao, a researcher at the University of Tübingen, discusses teaching crows to count out loud. They explore the complexity of this behavior and how crows have the right vocal skills for it. Other topics include stepping on snakes for science and hunting ice age cave bears.
Factors like snake sex, location, and temperature influence snake behavior, aiding in snakebite prevention strategies.
Cave bears may have faced extinction due to human hunting and habitat disruption over time, impacting their survival.
Deep dives
Studying Snake Bites and Behavior
A researcher in Brazil named Joe Miguel Alves Nunez conducted a study by stepping on venomous snakes, including a dangerous viper called Javarraca to understand why some snakes bite humans while others don't. He discovered that factors such as the sex of the snake, temperature, and where it is stepped on play a role in snake behavior. This study could help in developing strategies for snakebite prevention and treatment.
Hunting Cave Bears and Human Impact
Research on extinct cave bears suggests that humans may have driven them to extinction through hunting. Analysis of cave bear bones reveals a shift from minimal human interaction hundreds of thousands of years ago to intensive butchery around 40,000 years ago during the last glacial maximum. Human hunting pressure, coupled with habitat disruptions, likely contributed to the disappearance of cave bears.
Lizard-Inspired Building Designs
Engineers are exploring lizard-inspired building designs where structures can withstand partial collapse without catastrophic failure. By creating a building system that isolates collapsed sections, inspired by lizards shedding tails as a defense mechanism, engineers aim to prevent widespread building collapses during disasters like earthquakes or flooding. This innovative approach could potentially save lives and reduce rebuilding costs.
Crow's Ability to Count
A study on crow cognition delved into their ability to count by associating visual and auditory cues with specific numbers of vocalizations. Crows displayed numerical distance effects and varied acoustic features in vocalizations related to the quantity indicated. They demonstrated a planning process before vocalizing and could predict the sequence position of their calls, showcasing a unique numerical understanding in these intelligent birds.
A roundup of online news stories featuring animals, and researchers get crows to “count” to four
This week’s show is all animals all the time. First, Online News Editor Dave Grimm joins host Sarah Crespi to discuss stepping on venomous snakes for science, hunting ice age cave bears, and demolishing lizardlike buildings.
Next, producer Kevin McLean talks with Diana Liao, a postdoctoral researcher at the University of Tübingen, about teaching crows to count out loud. They discuss the complexity of this behavior and how, like the famous band, these counting corvids have all the right vocal skills to do it.
This week’s episode was produced with help from Podigy.