⚪LOST SIGNAL1999
WHEN THINGS GO WRONG
Not every mission
finds its way home
In 1999, two Mars spacecraft were lost. Mars Climate Orbiter disappeared because two teams used different units: one metric, one not. Mars Polar Lander fell silent while trying to land. Both losses taught engineers to check every number twice, and helped make later journeys safer.
CHAPTER 03 / WHAT THE JOURNEY LEFT US
The machines go quiet.
Their discoveries don't.
From moonquakes to ancient water, each signal returned with a new piece of the story.
Follow the discoveries →