Tag Archives: Mars

Wild Spirits: Measuring Life and Death with the Pasco Wireless CO2 sensor

A student once asked me why if carbon dioxide is so much heavier than air, how come the lower atmosphere doesn’t become thick with CO2 and kill everything? “Umm, well…because it…umm…doesn’t?” The student then asked if I was going to was going to answer her question with another question? Which of course is also a […]

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Mission to Mars, or, Where does this gravel come from?

“Where does this gravel come from?” is a question that you can ask about many places in the solar system—in the dirt on the playground and in the Gale Crater on Mars, now that the NASA Mars rover Curiosity has landed. Your playground gravel might have been dug up by the children or delivered by truck. […]

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