Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

.jp. That's Y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacult.

This is Scientific American 60-second Science. I'm Sophie Bushwick.

Is that person really glad to see me, or are they just being polite?

Some people struggle to distinguish a perfunctory grin from a truly happy smile,

and computers have found this task even more difficult.

That is, until researchers trained a program to detect

when a smile is genuine. Visual computing researchers at the University of Bradford in the UK started

with software for analyzing a changing facial expression. This program can examine a video clip of a human

head and identify specific details around the eyes,

cheeks, and mouth.

Then the program tracks the details moving relative to each other as the face smiles.

Next, the scientists had their program evaluate two sets of video clips.

In one, subjects performed posed smiles.

In the other, they watched a film that inspired genuine displays of emotion. The program

calculated the differences among the subject's faces during the two clips, and it turns out that

your mouth, cheeks, and eyes move differently when you're

faking that smirk. In particular, the muscles around the eyes shift 10% more for a real smile

than they do for a fake one. These results are in the journal Advanced Engineering Informatics.

...