GEOLOGY

Detailed explanation-1: -Some animals can figure this out without looking at a compass. They have tiny bits of metal in their cells that act like tiny compass needles! These bits of metal rotate to point north, giving these animals a natural sense of which way is north.

Detailed explanation-2: -Magnetoreception is a sense which allows an organism to detect the Earth’s magnetic field. Animals with this sense include some arthropods, molluscs, and vertebrates (fish, amphibians, reptiles, birds, and mammals, though not humans).

Detailed explanation-3: -According to the researchers, it’s possible that animals can detect magnetic fields symbiotically via bacteria living inside them – specifically, magnetotactic bacteria (MTB), which orient themselves along magnetic field lines due to a chain of magnetic structures inside their bodies called magnetosomes.

Detailed explanation-4: -So animals that use the magnetic field to orient themselves do so by detecting these differences in field strength and flow. They then use that information to figure out where they are and where to go.

Detailed explanation-5: -Summary: Around 100 of specific hair cells in the inner ear, called stereocilia could act as effective biological compass needles, allowing animals to accurately sense magnetic fields around them.