This is a passenger announcement. You can now book your train on Uber and get 10% back in credits to spend on Uber eats.

So you can order your own fries instead of eating everyone else's.

Trains, now on Uber. T's and C's apply. Check the Uber app.

This is scientific American's 60 second science.

I'm Christopher Intagata.

When restaurants first shut down early in the pandemic Americans rated grocery

stores they started cooking more at home and presumably generating more

leftovers those leftovers can be a convenient future meal but they've also

got a dark side.

There's a tendency that if you put an item on the plate that's a leftover,

there's a higher probability that you're not going to fully consume that item,

and so it's probably going to go to waste.

Brian Rowe, an applied economist at the Ohio State University.

He and his colleagues recently studied leftovers and food waste by tracking the eating

habits of 18 men and women in Baton Rouge, Louisiana.

The participants tracked what they ate using an iPhone app, and during the week-long

study, the study subjects collectively piled 1,200 different foods on their plates.

After analyzing what got eaten, saved, or thrown away,

the researchers found that leftovers were more likely

to be picked at and not fully eaten,

which is a finding we can all probably identify with.

But they also observed that leftovers, perhaps due to being older and less fresh, directed

...