The Earth’s population has reached a milestone by surpassing 8 billion people, the United Nations said this week. But the rate of increase is falling, and global population may begin to decline late in the century after topping out...
Earlier this week, the pharmaceutical companies Biogen and Eisai announced encouraging results from a clinical trial for patients with Alzheimer’s disease: a monoclonal antibody treatment, called lecanemab, reduced cognitive decline by 27% in people with early-stage Alzheimer’s compared with...
