Guide To Space - Bringing Mars To Earth

For over 50 years, scientists have dreamed of bringing a piece of Mars home to Earth—yet no sample has ever been returned from the red planet, despite decades of planning. Unlike the Apollo missions that brought back hundreds of kilograms of lunar rock, Mars remains the only major planetary body in our solar system untouched by sample return. The upcoming Mars Sample Return mission, a joint effort between NASA and the European Space Agency, is poised to change that, with a complex three-part journey: a European Fetch rover collecting cached samples left by NASA’s Mars 2020 and ESA’s Rosalind Franklin rovers, a NASA ascent vehicle launching the samples into orbit, and an ESA Earth Return Orbiter bringing them home. If successful, scientists will receive about 500 grams of pristine Martian material by the 2030s—enabling unprecedented research into past life, planetary evolution, and the feasibility of human habitation. This mission marks a pivotal shift from remote observation to direct study, turning Mars from a distant world into a laboratory on Earth. The episode traces the evolution of sample return missions—from the Soviet Luna landers and NASA’s Genesis crash to JAXA’s Hayabusa, which returned micrograms of asteroid dust. These past missions highlight both the risks and rewards of bringing extraterrestrial material home.