Mars Discoveries and Cosmological Mysteries. Guest: Bob Zimmerman. The discovery of galaxies devoid of dark matter is challenging fundamental astronomical theories. On Mars, the Curiosity rover has reached smooth ground after five years of rocky terrain.

Mars Discoveries and Cosmological Mysteries. Guest: Bob Zimmerman. The discovery of galaxies devoid of dark matter is challenging fundamental astronomical theories. On Mars, the Curiosity rover has reached smooth ground after five years of rocky terrain. Additionally, orbiters have detected multiple dust devils and potential frost and ice in the planet's equatorial regions during winter. 8
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