Fifty years ago this summer, Neil Armstrong took his “giant leap for mankind” on the moon. In his wake hundreds of others have flown into space, including Ellen Ochoa, a four-time shuttle astronaut who stepped down as director of the Johnson Space Center in 2018 and is currently a visiting fellow at the Harvard Kennedy School’s Center for Public Leadership.

Advocates and opponents of medical-aid-in-dying laws, also called physician-assisted death, gathered at Harvard Medical School for a two-day conference organized by the HMS Center for Bioethics.

A new survey by Harvard researchers shows that trust in leaders and institutions are at a low ebb in the eastern Democratic Republic of the Congo, highlighting the importance of gaining trust as part of the response to the growing Ebola epidemic there.

Humanitarian workers from around the globe will visit Harvard to discuss how best to treat the increasing number of diabetics among refugee populations. Symposium organizers talk about the problem and what they hope the symposium will accomplish.

A panel of experts at the Harvard T.H. Chan School of Public Health discussed how the globe might feed an estimated human population of 10 billion by midcentury and suggested a diet high in plant foods, low in red meat, as well as a host of reforms to how food is produced and distributed today.

Novelist Richard Powers’ “The Overstory” features trees as key characters in an entwined tale of human life and our impact on the natural world. He will speak at the Arnold Arboretum and the Mahindra Humanities Center later this month.

New research from Massachusetts General Hospital traces a previously unknown pathway from poor sleep to an increase in the fatty plaques that line blood vessels in atherosclerosis, a key feature of cardiovascular disease.

Author Paul Greenberg said eating more and different seafood, emphasizing species that are less energy-intensive to harvest and high in omega-3 fats, can help answer the world’s food challenges in the coming decades.

Research into extending humanity’s healthy lifespan has been progressing rapidly in recent years. In February, a group of aging and longevity scientists founded a nonprofit to foster the work and serve as a resource for governments and businesses looking to understand the potentially far-reaching implications of a population that lives significantly longer, healthier lives.

Eradicating the remaining pockets of HIV transmission in the U.S. by 2030 will be a challenge for the Trump administration, and depend on local cooperation in reaching high-risk groups with surveillance, prevention, and treatment, according to Harvard HIV/AIDS researcher Max Essex.