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 yawc.co.jot.com.j, that's y-A-K-U-L-T-C-O-J-P.

When it comes to a guide for your gut, count on Yacolt.

This is Scientific American 60-second science.

I'm Christopher in Thalata. Got a minute?

How heavy is the Milky Way in comparison to its neighbor galaxy, Andromeda?

Well, depends how you calculate it. In 2006, one group of astronomers figured the Milky Way was twice as massive as Andromeda, a 2009 estimate, even the score,

calculating that the two galaxies are equal in mass. Now a new formula suggests we're only half the mass of Andromeda. To come up

with that number, astronomers first measured the speed and distance of galaxies between 3 and 10 million

light years away. That allowed him to calculate the deformation of space timetime, and thus the mass, of our stellar

neighborhood, aka the local group, a group of more than 50 galaxies in which the Milky Way and

Andromeda dominate. They deduced the center of mass between the two heavyweights and found

that Andromeda may indeed be twice as massive as the Milky Way. The results are in the monthly

notices of the Royal

Astronomical Society. Researchers say this new model might be more accurate than past ones,

because it accounts for dark matter far from each galaxy's center, assuming the data's right,

that is. Well, I never bet money on anything, because, you know, I'm aware of all the

uncertainties and approximations.

Lead author Jorge Pena Rubia of the University of Edinburgh.

One year from now, two years from now, some clever guy will come and say,

...