Elsewhere
Australia's 5,600km Secret: The World's Longest Fence Isn't For Humans
24:17
What if the world's longest fence wasn't built to keep countries apart, but to stop wild dogs from eating sheep? Tyler Cooper takes you inside Australia's mind-blowing engineering project that stretches 5,600 kilometers across the outback and costs $10 million every year to maintain. Most people think the Great Wall of China is impressive. This fence is actually longer and way more effective at…