Yesterday, I devoted a lot of space to answering a reader question about something she thought she'd heard about granite counters emitting a gas that gave her a headache and could make people sick.

She didn't know the words, but what she was asking about was Radon coming from granite counters. Yesterday's column defined the terms atom, radiation, radioactivity and radon.Now that I've established those terms, I'm going delve back into the topic and write about how Radon gets into granite counters and whether or not it's dangerous.

Help! A couple days ago on our local news channel, they was talking about granite counters put off a dangerous gas. Studies showed people was having headaches and a few other symptoms. I forgot the gases that it puts out. I missed most of this, but I get headaches all the time since we moved into our new house. We have granite counters. Do I have radon and is that what's giving me headaches? I read you every day. Thanks.