Hey Lautif from Radio Lab here, we are partnering with the International Astronomical Union to give you a chance to name one of Earth's quasi moons.

And this isn't like the naming a star after your dead pet kind of thing.

This will be the official forever name of this guazzy moon.

Submit a name now through September or vote on the name you like best in November.

It's your chance to leave your mark on the heavens.

Go to Radiolab.org slash Moon to find out more.

This is Scientific American's 60 Second Science.

I'm Christopher and Tagyatta.

When you walk with a backpack, you know how the stuff inside sways from side to side?

Now scientists have figured out how to tap into that motion to generate electricity.

Here's how it works. Picture a pendulum, mounted to a backpack frame and stabilized with

springs on either side. The pack's weight is attached to the pendulum, so the pendulum

swings side to side as you walk. Gears then use that swinging motion to drive a generator,

and the generator spits out electrical current to charge a battery.

Volunteers carried that pack while walking on a treadmill,

and they wore masks to measure the flow of oxygen and carbon dioxide.

Walking with the slightly swaying 20-pound load, the device did not significantly affect the volunteer's metabolic rate, compared to when they carried the same weight fixed in place.

In fact, the energy harvesting pack reduced the forces of acceleration they'd feel in a regular pack,

which might mean greater comfort for a long hike.

And the device did produce a steady trickle of electricity.

The operative word being trickle.

Because if you up the load to 45 pounds, the passive motion of the pack could fully charge

...