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Last week's total solar eclipse inspired awe in the millions of people across America who took time out of their day to bask in the shadow of the moon as it passed between Earth and the Sun.
But the Great American Solar Eclipse was also a unique opportunity for planetary scientists studying Mars.
Here & Now's Meghna Chakrabarti talks to Jim Green, director of planetary science for NASA, about the Eclipse Ballooning Project, in which dozens of weather balloons carrying metal tags coated with bacteria were sent up into the atmosphere.
This segment aired on August 29, 2017.