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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That's y-A-K-U-L-T dot-C-O-J-P.

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

This is Scientific Americans' 60 Second Science.

I'm Emily Schwing.

The boreal forest is the largest terrestrial biome in the world.

It covers 14% of the land on Earth.

And today I'm here with my dogs on the north side of Denali National Park and Preserve.

Come on.

What?

Come on.

I'm walking my dogs through the boreal forest.

It's also known as Taiga.

It covers 1.3 billion acres of the Earth's surface. This forest is actually really beautiful. There's these black spruce trees. They're stumpy. Sometimes they're really short and growing in different directions. There's lichen that hangs off of the dead branches, bright green lichen.

Today there's a skim of snow on the ground over top of this feather moss that just covers the

forest floor. There's a magpie on a tree branch right in front of me. Wildfire is a normal part of the

life cycle for the boreal forest, but as the climate warms, this ecosystem is becoming increasingly

vulnerable. That vulnerability risks turning this forest from a carbon sink into a carbon source.

When the boreal forest burns, it has the potential to release gigatons of carbon into the atmosphere.

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