Humans Changed Earth’s Magnetic Poles—By Building Dams?

A groundbreaking Harvard study reveals that thousands of dams and reservoirs have trapped so much water that they physically shifted Earth’s magnetic poles by about one meter between 1835 and 2011—and even lowered sea levels by nearly 21 mm! 🌍💧

🔍 **In this video, you’ll discover:**

1. How over 6,800 dams built globally re-distributed mass, causing Earth's crust to slide over the mantle—a process called true polar wander.

2. The two phases of movement: first 20 cm east (1835–1954) due to North America & Europe dams, then 57 cm west (1954–2011) as Asia & East Africa built large reservoirs.

3. How removing that water from oceans lowered global sea levels by 21 mm, offsetting a quarter of 20th-century rise.

4. Why this matters: we need to factor such human-caused movements into climate models, navigation, and sea-level projections.

🌊 We've done more than reshape rivers—our engineering has nudged the North Pole across continents.

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#EarthScience #TruePolarWander #MagneticPole #Dams #ClimateChange #SeaLevel #HarvardStudy #ScienceAlert #Geophysics