In a fascinating discovery, scientists have uncovered how pigeons navigate even on overcast days, relying on special cells in their liver. These iron-rich cells act as an internal compass, enabling pigeons to sense Earth’s magnetic field, according to a study published in Science.
Unraveling the Mystery of Bird Navigation
Historically, pigeons have played crucial roles, from delivering messages during World War I to aiding reconnaissance efforts in the Cold War. Their ability to navigate long distances has intrigued scientists for years. While it was known that birds use the sun, smells, and landmarks for navigation, the role of magnetic fields, especially in cloudy conditions, remained a mystery.
Researchers Christian Kurts and Martin Wikelski, from the University Hospital Bonn and the Max Planck Institute of Animal Behavior, respectively, discovered that pigeons use liver cells with quantum properties to navigate. These cells, though not inherently magnetic, become superparamagnetic when exposed to a magnetic field, allowing pigeons to determine direction.
Testing the Theory
To test their hypothesis, the researchers trained 34 pigeons to fly a 12-mile route in Germany under different weather conditions. By depleting the iron-rich cells in some pigeons, they observed that these birds struggled to navigate under cloudy skies, unlike their counterparts with intact cells.
The study suggests that these liver cells transmit magnetic information to the brain, guiding the pigeons’ flight paths. This discovery opens new avenues for understanding how immune cells communicate with the nervous system.
Implications and Future Research
While some scientists remain skeptical, citing the need for more direct evidence, the research highlights a potential new mechanism for magnetic perception. The findings could have broader implications, as similar materials are found in other animals and even in humans.
The research team plans to further explore the communication between immune cells and nerves and has established a satellite system to track pigeons globally. This work could transform our understanding of navigation in the animal kingdom.
Original reporting: KTVZ (Central Oregon) — read the source article.
