Insights

Tonga volcano eruption yields insights into asteroid impacts on Earth

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On Jan. 15, 2022, the Hunga Tonga-Hunga Ha’apai volcano erupted off the coast of Tonga in the South Pacific Ocean, generating a tsunami and triggering resulting wave action alerts around the world.  The underwater volcanic eruption spewed ash, steam, and gas a radius of over 160 miles (260 kilometers) and more than 12 miles (19 … Read more

New Insights into Ancient Greece’s Planetary Motion Machine

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The Antikythera mechanism is one of the most astonishing discoveries in archaeology. Salvaged from a 2,000-year-old shipwreck in Greece in 1900, the intricately geared contraption was quickly recognized as a machine for calculating the movement of the moon and planets. It continues to surprise, as researcher Tony Freeth reveals. The gears are more delicate and … Read more