11.   But I think for a person who is financially very responsible, a home equity loan can be very useful thing.

12.   Charge is what makes electrical current flow through a maze of wires to do useful things, such as activating a heating element or encoding data.

13.   First we meet Bill Tregle, a burly Louisiana native who lives on a houseboat and makes useful things from alligator skins.

14.   Gardeners appreciate useful things that last.

15.   He collected off-season camping gear and other useful things and stored it together.

16.   He took what he thought would be useful things, like an ax, a small stove and a sack of flour to make bread.

17.   He wanted his children to do socially useful things.

18.   Here is this amazingly useful thing, built from the bottom up by idealists, largely self-regulated and beyond the reach of governments or big business.

19.   Here are some other useful things to know about worms.

20.   It builds useful things, like the Panama Canal, and enables valuable research, like discovering the cure for polio.