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.jp. 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.

The massive earthquake that rocked Japan in March 2011 took thousands of lives.

It sent tsunami waves more than 100 feet high towards northern Japan,

where they battered the Fukushima Daiichi nuclear plant and swallowed up whole swathes of coastline.

And large amounts of villages and towns and cities washed into the ocean.

Jim Carleton, a marine ecologist at Williams College.

A huge amount of infrastructure, fisheries facilities, aquaculture, children's toys,

to fisheries baskets, to many vessels, boys, containers,

everything one could imagine.

Time and ocean currents have delivered hundreds of those objects to U.S. shores,

along with the stuff living in and on them, mussels, anemones, barnacles, crustaceans, worms, even a few fish caught

swimming in boats. Carlton and his team have now recovered more than 600 pieces of that debris,

with the help of a huge network of scientists and citizen volunteers, and they've cataloged to all

those hitchhiking Japanese species. The full manifest, 289 species in all,

is listed in a report in the journal Science. While it's hard not to admire their tenacity,

some of these transplants could pose a danger to local species. It's really ecological roulette.

It's really a matter of any number of species which have no prior history at all

...