An In-Depth Look at Recent Mars Science And Exploration

<p class="p1"><span class="s1">A new paper looks at marsquakes and what is causing them, which turns out to be magma moving. And Curiosity has found rocks it needs to go around. Then there is the weather on Mars. Plus, lunar formation, a giant comet, and this week in rocket history, we look back at Apollo 13.</span></p>