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Liviu Giosan

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Climate Change Spurred Fall of Ancient Culture

Climate Change Spurred Fall of Ancient Culture

The Harappans may be the most advanced ancient civilization that most Westerners have never heard of. They flourished in the Indus River basin on the Indian subcontinent around the same time the Egyptians were building…

Sam Zipper

Sam Zipper

It might seem strange that Sam Zipper spent his summer on balmy Cape Cod studying the western Canadian Arctic. But for Zipper, examining sediment cores from the Mackenzie River Delta with Woods Hole Oceanographic Institution…

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Noah’s Not-so-big Flood

A long time ago, whether your time frame is biblical or geological, the Black Sea was a large freshwater Black “Lake.” It was cut off from the Mediterranean Sea by a high piece of land…

Analyzing Ancient Sediments at Warp Speed

Analyzing Ancient Sediments at Warp Speed

Like a toy out of a science fiction story, the X-ray fluorescence core scanner reveals intimate details of the composition of ancient mud and sediment–which can contain a variety of clues about past climate and…

The Once and Future Danube River Delta

The Once and Future Danube River Delta

?The Danube River Delta is like the Everglades,? said Liviu Giosan, who grew up near the Romanian wetlands. The triangle-shaped, sediment-rich region at the mouth of the Danube River is also rich with human history….

Rising Sea Levels and Moving Shorelines

Rising Sea Levels and Moving Shorelines

Changes to the shoreline are inevitable and inescapable. Shoals and sandbars become islands and then sandbars again. Ice sheets grow and shrink, causing sea level to fall and rise as water moves from the oceans…