This pepper spray gun fires rounds that create a 5-foot irritant cloud, offering non-lethal protection at a distance of up to 150 feet. What do you think of this option for self-defense? 📹: Salt Supply Co. / YT | Interesting Engineering

What traces are left behind when a gun is fired? 🔫 We have a look at how investigators analyse gunshot residue. If you can't get enough of CSI, don't miss the 2022 Christmas Lectures on 26, 27 and 28 December on BBC Four, where forensic anthropologist Sue Black will take us on a journey through the fascinating field of forensics. Find out more: rigb.org/christmas-lectures | Royal Institution of Great Britain