By LYNNE WEISS

Some say it’s the most dangerous place in the world, but that might depend on your species. Surrounded by barbed wire, minefields, and soldiers, the demilitarized zone between North and South Korea seems anything but, yet this strip of land a couple of miles wide and about a 160 miles long is a safe and peaceful haven for plants and animals. There has been almost no human activity within it for over 50 years.