When was Mars Pathfinder first launched? 

December 4, 1996
Mars Pathfinder was launched December 4, 1996 and landed on Mars' Ares Vallis on July 4, 1997. It was designed as a technology demonstration of a new way to deliver an instrumented lander and the first-ever robotic rover to the surface of the red planet.
system
When was Mars Pathfinder first launched? 

December 4, 1996
Mars Pathfinder was launched December 4, 1996 and landed on Mars' Ares Vallis on July 4, 1997. It was designed as a technology demonstration of a new way to deliver an instrumented lander and the first-ever robotic rover to the surface of the red planet.
user
Mars Pathfinder was first launched on December 4, 1996. 
assistant
<|system|>
</s>
<|user|>
When was Mars Pathfinder first launched? 

December 4, 1996
Mars Pathfinder was launched December 4, 1996 and landed on Mars' Ares Vallis on July 4, 1997. It was designed as a technology demonstration of a new way to deliver an instrumented lander and the first-ever robotic rover to the surface of the red planet.</s>
<|assistant|>
Mars Pathfinder was first launched on December 4, 1996. </s>
