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Thank you. and quote, science podcast to receive special offers. Welcome to the science podcast for July 15, 2016.

I'm Sarah Crespi.

In this week's show, Julio Rosen talks about humanity-ending catastrophes.

And Alex Kiselnik is here to discuss ducklings that imprint on differences.

Dave Grimm's out this week.

He'll be back next week.

This week's issue has a whole section dedicated to natural hazards.

Julia Rosen of previous science podcast fame is here to talk about her contribution.

An article called Thinking the Unthinkable, which is just your basic overview of doomsday scenarios.

Science has already picked an expiration date for life on this planet.

When the sun starts to bake the Earth in about a billion years, we're going to be gone.

But it's not guaranteed that we'll make it to that exciting time. So, Julia, what are some of the likely catastrophes, or not likely, but

which ones are possible between now and when the sun ends human life for certain?

Well, I think the first thing to emphasize is that we're not in any immediate danger right now.

Nothing is impending. It's interesting. I talk to people who actually

are specialists in the field of catastrophic risk. And actually, the majority of their work is on

...