Raptor eyes – what new research reveals about the sharpest vision in the world

Why does an eagle tilt its head when it looks far away? New research shows how raptor eyes work – with two sharp spots in each eye, lightning-fast vision and a gaze twice as sharp as ours.

Read also: Raptor talons and beaks – what new research reveals about nature's sharpest tools →

Read also: The long journey of the feather – from the first dinosaur feathers to the eagle's wing →

Read also: The day the dinosaurs died – and why birds survived →

Which birds of prey hunted in the Ice Age? Ice Age giants – the great birds of prey we lost →