Study: Salmon Could Use Earth’s Magnetic Field To Go Home

Ashley Ahearn — Fri, 08 Feb 2013 16:20:50 +0000

Salmon travel thousands of miles out to the open ocean to feed and mature. Then after a few years they head home, back to the exact river where they hatched to spawn the next generation.

Scientists don’t fully understand how the fish find their way back, but a new study found that salmon could be determining their routes home by shifts in the earth's magnetic field.