single

Two of their last three matches at Twickenham have been decided by a single point.

A third, as well as a disallowed fourth through Tadhg Beirne, would follow before the turn, but Ireland failed to score a single point across the game's final 48 minutes.

This points to Antarctic blue whales being one single circumpolar population in the Southern Ocean.

But there hasn't been a single hearing, she says.

An experiment on great tits has pinpointed a single factor -- immigration -- that can cause birds to pay close attention to others, leading them to rapidly adopt useful behaviors.