A new high-speed X-ray video camera, now the fastest in the world, can see through molten metal and watch weld-weakening flaws form in real-time.

The $670,000 device successfully captured X-ray footage on Nov. 23 at 5,000 frames-per-second (fps), or five times faster than previous X-ray cameras (and 83 times faster than a consumer camcorder). The high-speed video above shows a laser welding solid aluminum in visible light, followed by the