Posts by Hannah Mark

Harry Potter and the 12-minute conference talk

One of my favorite podcasts, Harry Potter and the Sacred Text, begins each episode with a segment called the “30 second recap”: Vanessa and Casper, the two hosts, get 30 seconds each to summarize everything that happened in a single chapter of a Harry Potter book*. They start out speaking normally, covering everything in detail,…

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SCARF 2017: A modern-day transatlantic crossing

At 16:00 UTC (12 noon, EST) on October 8 2017, midway across the Atlantic Ocean, Earth’s magnetic field strength dropped to 0. Had we just made an exciting new discovery? Was this evidence of an imminent geomagnetic reversal? Was a mysterious lump of magnetite on the seafloor cancelling out the ambient field?…or did the magnetometer…

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