A person has muscles on the face that are almost never worked out ... Try to do 10 to 25 reps. A big, full smile can also help strengthen the muscles around the mouth and tighten laugh lines.

Some people liken this peculiar phase of the sun and moon as a "Cheshire cat smile" or a "horizontal smiley face" shape. In a March 1, 2025, Space.com story, the site describes the March 29 ...