In 1957, in the Netherlands, there was a bygone era of open-air classrooms. This concept can be traced back to the early 20th century in Europe, where it emerged as a means to aid unwell children. These classes were conducted amidst dense forests, far removed from urban hubs, on the belief that ample ventilation, fresh air, and sunlight contributed positively to the physical and mental well-being of the students. These unique schools were intentionally designed to combat tuberculosis (TB), an infectious ailment primarily affecting the lungs. TB spreads through the air when an infected person coughs, sneezes, speaks, or spits. The history of TB reaches back to ancient times, with evidence of the disease found in the remains of a 17,000-year-old Bison discovered in Wyoming. Even the preserved remains of prehistoric humans and Egyptian mummies from 5,000 years ago show signs of TB infection. In the 1800s, TB was a leading cause of death in Europe, but by the mid-20th century, mortali...