Three weeks after the cave-in of the Crandall Canyon Mine, rescuers are still searching for missing miners, but now they’re hoping for help from a robotic camera. After drilling another hole into the mine, and finding no new information, rescuers were planning to use an 8-inch, 70-pound, waterproof camera to search for possible survivors.

The robot, constructed over the past week by the Canadian company Inuktun, could be lowered up to 2,000 feet, and should then be able to travel another 1,000 on its own. It has two cameras and a 200-watt light to brighten up the space, but there’s no guarantee that it will even make it down into the holes.—Gregory Mone