https://www.msn.com/en-us/news/technology/elephant-seals-have-built-in-gps-that-tells-them-when-to-head-home/ar-AAUqlcc?ocid=msedgntp
Every year, pregnant female elephant seals carry out an ambitious 6,200-mile (10,000km), 240-day journey across the Northeast Pacific Ocean in search of food.
Despite this, the females always seem to make it back home just in time to give birth – and until now, it's remained unclear how they nail this timing.
Now, new research has revealed that pregnant females appear to have an internal map sense, which functions like a built-in GPS and helps ensure they get home within five days of their pup's arrival.
'Migrating elephant seals know how far they are from their breeding beach thousands of kilometres away,' said Roxanne Beltran of the University of California Santa Cruz.
'They also know approximately how long it will take them to get back.'