Hank Green will deliver MIT’s 2025 Commencement address on May 29. The science communicator, video producer, and entrepreneur has built online communities of people who love diving into complex issues.

Turning a seaweed crisis into an energy opportunity, Legena Henry SM ’10 is converting rum wastewater and invasive Sargassum seaweed into an important biofuel in her native Barbados. “This solution is a win-win-win,” she says.

New solar panel installations on four buildings are “just one part of our broader strategy to reduce MIT’s carbon footprint and transition to clean energy,” says Joe Higgins, vice president for campus services and stewardship.

Catherine De Wolf SM ’14 PhD ’17 is using AI and other tech to take stock of building infrastructure and match new construction with materials from structures being demolished.

Drawn to hard problems, Zachary Hartwig is advancing a new approach to commercial fusion energy. “There’s something very attractive to me about the magnitude of the fusion challenge,” he says. “It’s part of the reason I’ve stayed in this field.”

Astronomers have found the smallest asteroids ever detected in the main belt between Mars and Jupiter. The team’s detection method, which identified 138 space rocks ranging from bus- to stadium-sized, could aid in tracking potential impacts.