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.

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

This is Scientific American's 60-second science. I'm Christopher in Taliatta.

Twitter has more than 300 million monthly active users, but researchers have estimated that between

about 30 million and 50 million of those are Twitter bots, automated accounts that do the

bidding of their code writing creators.

There could be newsbots and there could be spam bots.

Zafar Ghilani, a PhD student at the University of Cambridge in the UK.

Or there could be bots which are doing political infiltration, which is obviously bad,

or social infiltration, which could be bad.

Not all bots are bad, though.

Some are just geeky, like a bot that describes imaginary exoplanets,

or another that tweets only prime numbers.

It really depends on who the bot master is and what are the intentions, what are the motivations.

Galani and his colleagues built an algorithm to single out bots from human accounts

using factors like tweet frequency or content and how much users interacted

with other users. And the system was able to tell bot from human 86% of the time. But in the case

of celebrity accounts, people with more than 10 million followers, the bots and humans were harder

to tell apart. Because both tend to tweet with more scheduled regularity than the average human,

...