The Senate held a new congressional UFO hearing on April 19, 2023. It focused on the Pentagon's program AARO but also revealed interesting new videos and data.
On April 11, 2023, NASA unveiled its test Mars habitat where four volunteers will spend a year. This is a trial for astronauts who may visit Mars in the future.
Success for the midnight SpaceX launch on April 14-15, 2023. The launch - from California - was expected to be visible from San Francisco to Los Angeles.
India is overtaking China as the world's most populous country. Both currently have around 1.4 billion people. India may take the title sometime in April 2023.