Inventions, firsts, and turning points tied to today’s date — each one sourced and dated.
A landmark federal report, built on more than 7,000 studies, declared cigarette smoking a cause of lung cancer and reshaped public health.
In 1935, Amelia Earhart became the first person to fly alone across the Pacific, a route that had already killed several aviators.
A dying 14-year-old in a Toronto hospital became the first person to receive insulin, turning a death sentence into a manageable condition.
