It's a toothed wheel.

Dolphins and toothed whales use echolocation.

So this is a toothed wheel.

Small pulley and two strong magnets.

It was during the ice age that the saber toothed tiger became extinct.

We've been talking, I guess, about fires and caves and saber toothed tigers.

The screw, the lever, the wedge, the pulley, etc. are called simple machines.

This is a large pulley made by sandwiching rubber between two old CDs.

If I spin this pulley, the small one's going to spin much faster.

This pulley has sufficient wall thickness to allow us to use standard soft jaws

WK I use a bicycle frame, and a pulley, and plastic pipe, what then pulls

And this was the pulley system. This was what we were able to muster for Sergio.

In this illustration, the red ring represents the cutting path needed to cut the jaws to support our pulley part

About 150,000 years ago, when language came online, we started to put words to this constant emergency, so it wasn't just, Oh my God, there's a saber toothed tiger, which could be, it was suddenly, Oh my God, I didn't send the email.

On the village green an inclined strong word missing? , down which, clinging the while to a pulley swung handle, one could be hurled violently against a sack at the other end, came in for considerable favour among the adolescent, as also did the swings and the cocoanut shies.

literally one of those basket handbags and they tied it to a curtain rope from one of the offices at U.N. headquarters, and created a pulley system into this shaft in this quivering building in the interests of rescuing this person, the person we most need to turn to now, this shepherd, at a time when so many of us feel like we're lacking guidance.