Fan introductions left for Martians.

• Position: Ebuzz - Plasmon Inc. - Brief Article

Colorado earthlings are leaving their imprint on Mars as NASA's two exploration rovers inch along opposite sides of the planet. Preparing for the launches last summer, a company called Plasmon, based in England but with operations in Colorado Springs and Englewood, created a time capsule of sorts for any Martians who might wander by the machines in the next 500 years.

The "time capsule" is shaped liked a DVD but made out of silica glass to withstand extreme temperatures and durable enough to last five centuries. Mounted on the lander petals of both rovers, the disks contain the names of 4 million Mars enthusiasts collected by NASA.

Plasmon made the disks for the Planetary Society's "Red Rover Goes to Mars" educational project. A maker of electronic archival storage solutions, the company is based in Cambridge, but most of its 500...