Researchers still don't know what the open-mouth facial expression means or whether it's akin to smiling in humans—but ...

You can tell a lot from a smile. For humans, it’s a symbol of joy. For bottlenose dolphins, they have similar “open mouth” facial expressions to convey playful intentions.

Bottlenose dolphins use an "open mouth" facial expression during social play to signal playfulness. This expression is ...

Dolphins are among the most playful and social animals on Earth ... indicates that they use an “open mouth” facial expression similar to a smile to communicate during social play.

In this context, there’s a tendency to read a lot into animals’ facial expressions. Sometimes this is wildly wrong, such as ...

Bottlenose dolphins have been recorded using open mouth expressions, resembling human smiles, and mirroring those expressions ...

They found that bottlenose dolphins use facial expressions - similar to a smile - to communicate during social play ... is a ...

Scientists have conducted a new study on dolphins' play and found that their smile-like facial expressions do not always ...

New research shows that bottlenose dolphins (Tursiops truncates) use the 'open mouth' facial expression -- analogous to a smile -- to communicate ... helping animals -- and us -- signal fun ...

Dolphins are actually smiling at each other when they open their mouths while playing with one another, according to a recent ...