In 1970, Apollo 13 engineers built a life-saving air filter from cardboard, plastic bags, and duct tape while astronauts drifted through space

Apollo 13's Moon mission turned into a survival story after an oxygen tank explosion. Astronauts faced a deadly carbon dioxide buildup. Their lunar module's filters did not fit the command module's. NASA engineers devised an adapter using everyday items like cardboard and duct tape. Astronauts assembled this device, nicknamed 'the mailbox', saving their lives.