Today's Health/Science: migraine risks, cleansing claims, time travel, what GINA means

Although the pain often knocked victims out for hours or even days, migraines used to be seen as merely a quality of life issue - they were painful, they caused problems, but it was just a headache. But new studies have shown increasing links between people who have migraines and a higher risk of stroke and heart attack.

Generally, people don't need to take dramatic steps to "detoxify" themselves because human bodies have multiple systems for getting rid of wastes, by sweating, exhaling, urinating, and defecating. If you really want a "clean" system, eat more fruits and vegetables and less junk food, all of which we're supposed to do anyway.

For years, Ronald Mallett (left), a physicist at the University of Connecticut, stayed in the "time-travel closet," as he put it, keeping his desire to build a time machine under wraps for fear of ridicule. Today, with other established physicists speaking openly about time travel, Mallett is finally able to talk unabashed about his research.

After stalling in Congress for more than a decade, a bill that bans discrimination on the basis of a person’s genes won approval on May 1. President Bush is expected to sign it this week. Several local experts comment on what the Genetic Information Nondiscrimination Act means for the public.

Also, is it possible to create a true vacuum and do allergies really cause grumpiness?