The world needs help. Power demands are rising, bridges are collapsing, cancer is still cancer. These are sweeping, global challenges, but the solutions may well end up coming from the garages and basements next door. As the winners of PopSci's second annual Invention Awards demonstrate, invention—even world-changing invention—can happen anywhere there's an idea and an endless drive to see that idea made real. Launch the articles and videos below for 10 examples of homespun creativity tackling real problems.