- Did cancer exist before man-made chemicals were around to create it?
- How long can you use a cell phone before getting a brain tumor?
- How much extra radiation am I exposed to if I stick my hand in the microwave right after it turns off?
- Is ionizing radiation always harmful?
- Why are cancer mortality rates rising?
- Why don't dark-skinned people get sunburns?
- Why isn't there just one cure for cancer?