This is long lead.

We're supposed to learn from our own mistakes that other people's errors can be instructive too.

From efforts to control the weather that went disastrously awry,

to the untimely death of the Segway boss,

history is a treasure trobe of mishaps and meltdowns that can teach us all. I'm Tim Harford,

host of Cautionary Tales, the podcast that minds the greatest fiascos of the past for their most

valuable lessons. Listen to Cautionary Tales wherever you get your podcasts.

When was the last time you felt good about the internet?

The online landscape today is a harrowing one.

People screaming at each other on social media,

violent videos going viral.

Cyberbullying, racism, misogyny. It's hard to say for sure where the web

started to turn sour. But a case can be made that the last good day of the internet was February 26,

2015.

How could we not start with this video? Two llamas on the run in Sun City for hours today.

That morning, people around the country were huddling around their monitors.

A news event was unfolding that was holding the internet in a trance.

The must-see video of the day, llamas on the loose in the valley.

A pair of llamas had escaped from a visit to a nursing home in Sun City, Arizona.

A man let go of his rope, and before we knew it, it was llamas day out here in Sun City.

So we're double choppering the two llamas for the day.

Helicopter crews documented the chase as the Lama's dodged handlers.

...