The first CNN Hero of 2024 founded a nonprofit that teaches kids with troubled pasts how to train homeless dogs to help get them adopted. Quincy Wilson is making history ahead of the Paris Summer Olympics. In Maine, a children’s clothing store buys back its clothes and repurposes them, so they don’t end up in landfills. Divers and a marine biologist are helping save sharks from the two issues that threaten their existence. Plus, how the demise of the dinosaurs may have helped grapes thrive.