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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

The annual meeting of the National Rifle Association is coming up in May.

It's scheduled for Dallas, and if past events or any guide, gun injuries may actually go down in Texas during the event.

When the convention is held in a person's state in that year, gun injuries fall.

Anupam Jaina, an economist and physician at Harvard Medical School.

Jaina and his team discovered that surprising link

by tracking visits to hospitals and emergency rooms for gun injuries

during nine years' worth of NRA conventions.

And they found the number of people hurt by guns dropped 20% during NRA meetings, compared to the

same days of the week, three weeks before and after the show. There is no definitive causal link here,

but the researchers do have a few ideas. First, could be avid gun users are at the show, away from

their guns, or shooting them in more supervised situations, and

thus unable to injure themselves or others. Or if some members of a regular gun club are out of town,

maybe the group postpones its meet-up the week of the show, thus avoiding accidents that

otherwise might have occurred. It could be the case also that people who own venues where firearms

might be used,

like firing ranges or hunting grounds, may be likely to attend these conventions. And if those

...