A squeezing across the chest, a feeling of unease, that sent something's not right.

It can be easy to dismiss the early signs of a heart attack, but it's never too early

to call 999 and describe your symptoms.

Your NHS is here for you.

So the apothecaries founded this space as somewhere where they could train their students

in how to identify medicinal plants from harmful plants that can kill and cure, so to speak.

In London's neighbourhood of Chelsea, next to the River Tem and enclosed by a tall brick

wall, is a collection of poisonous plants that can kill you.

There are also plants that can treat you when you're sick, and even plants that many

of our modern medicines are derived from.

I'm Shaila Love, and you're listening to Scientific American Science Quickly.

Today, we're paying a visit to the Chelsea Physic Garden, one of the oldest botanical gardens

in Europe with four acres dedicated to the ancient science of healing.

When I first walk inside, it looks like a typical garden.

There's a gravel path that crunches under my feet and twists and turns through crowded

plant beds.

But after glancing at the map, it becomes clear I'm in a different kind of garden.

Where my right is a poison bed, where the plant science also include a skull and crossbones.

Maybe we can go to the poisonous plants, because I feel like that's probably a big draw.

Yeah, we don't see that often in botanical gardens.

That's adjacent to the garden of useful plants, which contains plants associated with scientific

developments of the past and present.

...