This week, we marked the 20th anniversary of Pathfinder’s landing on Mars and have had an active robotic presence there ever since—in fact, no one under 20 has experienced a day without NASA at Mars—but the Pathfinder mission was the FIRST-ever robotic rover to explore the Red Planet. Below are 10 things to know about this iconic mission as we celebrate two decades of unprecedented science and discovery: https://nasa.tumblr.com/post/162713336154/solar-system-things-to-know-this-week
