Since their discovery in the 1990s, the head-direction cells in the brain have been referred to as its "internal compass." ...

These neurons group together in specific areas of the brain to form an “internal compass.” With every twist and turn, this compass allows the fly to keep track of the direction it is moving in ...

But how do they do it? They only have around 1 million neurons (compared to our 100 billion) — so, where is their internal ...

"Our results provide evidence to support the idea that your internal 'compass' readjusts as you move through the environment," Dr Martin Chadwick, lead author of the study, said. "For example ...