Latest Steven M. Reppert Stories
New research uncovers that monarch butterflies make the 2,000-mile journey to the same mountains in Mexico using the Earth's magnetic field.
Millions of monarch butterflies from across the eastern U.S. begin a southward migration each fall to escape the frigid temperatures of the northern boundary of their range. They travel up to 2,000 miles to reach an overwintering site in a very specific grove of fir trees in central Mexico.
After years of theorizing about how Monarch butterflies find their way to Mexico for the winter, scientists have finally discovered that their antennas help them navigate the journey.