This Halloween, we're going to explore some fascinating and maybe even a little bit spooky topics.

First, we'll talk about the blurry lines between life and death.

You know, there's research that shows that when the heart stops, the brain can sometimes surge with unexpected activity.

And what does that mysterious burst mean?

Then, our producer is going to chat with sci-fi legend Kim Stanley Robinson about the deep

connections between science and science fiction, how one inspires the other in incredible ways.

And to make up for all the scary death talk, who doesn't love a warm and fuzzy sea turtle story?

Well, green sea turtles are finding a new home in urban waters.

And I'm going to tell you all about it.

I'm Dr. Samantha Yameen.

Welcome to Curiosity Weekly.

For centuries, the moment of death was considered absolute, a clean break between life and whatever comes next.

But modern neuroscience is challenging that certainty.

Scientists have recorded a surge in brainwaves from two people when their life support was withdrawn.

As their heart began to fail, their brains didn't go silent.

They briefly lit up.

The team out of the University of Michigan

used an EEG to monitor brainwaves in four patients coming off life support. And in two of the

patients, who were comatose, the researchers found something interesting. A surge of gamma brainwaves,

patterns associated with consciousness, memory, and awareness, even after the heart stopped beating.

These waves weren't random either.

They appeared in the so-called posterior hot zone, a region linked to vision and bodily awareness

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