Dolphins and toothed whales use echolocation.

Small pulley and two strong magnets.

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

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.

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

WK I use a bicycle frame, and a pulley, and plastic pipe, what then pulls CA Do we have a picture of that? Can we have the next slide?

But all they had was a woman's handbag 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.