Many also took notice — and snapshots — of the 4 by 4 foot (1.2 by 1.2 meters) custom aluminum road signs that were placed along the space shuttle's route.

Each member of the four-person crew has a unique call sign, ... Amy Thompson is a Florida-based space and science journalist, who joined Space.com as a contributing writer in 2015.

A father-daughter duo has decoded an alien-like signal beamed from a spacecraft in 2023. Now, citizen scientists are trying to interpret the cosmic puzzle.