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Falcons and horses can see in three dimensions (3D), which helps them perceive distance and depth. Octopuses and squid thought to lack 3D version. Many researchers once though the same about cuttlefish, but Trevor Wardill and his team wanted to test whether this assumption was true. The team studied how cuttlefish wearing 3D glasses reacted to 3D images of shrimp (a favorite prey) projected on a tank wall. Cuttlefish changed their striking position to match the 3D images, suggesting that their vision is more like that of falcons and horses than that of octopuses or squid.