Next time you need directions, maybe you can ask an ant. Why? Because these clever little animals are such masters (能手) that can find directions 1 they're walking forward or backward.
Ants often travel long distances when they're finding foods. But they can 2 find the right direction by using the position of the sun, their past memories and what they can 3 around them.
The scientists put obstacles in ants' way, but they could still go in the right direction 4 their food. One professor said. "Ants have a tiny brain. smaller than a pinhead (针头). But they can find their way 5 under many difficult conditions."
