Explaining The Universe on Instagram: "@ExplainingTheUniverse teaches you something NEW everyday day 🧠💫 Barbed wire is a type of fencing made from two or more steel strands twisted together with sharp metal barbs spaced along the length. It’s designed to create a barrier that’s cheap, lightweight, and very effective at discouraging animals—and people—from crossing. When something tries to push through, the barbs snag or scratch, creating a strong psychological and physical deterrent without ne