![Stall Catchers citizen scientist Blood vessels in a mouse brain](http://static.sciencelearn.org.nz/images/images/000/003/927/full/OCS_ART_30_Stall_Catches_BloodVessels.png?1674172495)
In Stall Catchers, you look at ‘movies’ of blood vessels that have been acquired from using a fluorescence microscopic imaging technique at Cornell University. In each movie, you analyse a single blood vessel highlighted in an orange outline to determine if the blood flow has stalled.