SMRTR Science & EngineeringDec 16, 2025Live Science

Polar bears in southern Greenland are 'using jumping genes to rapidly rewrite their own DNA' to survive melting sea ice

SMRTR summary

Polar bears in southern Greenland are activating "jumping genes" that rapidly alter their DNA in response to rising temperatures and melting sea ice. These transposable elements are changing genes related to heat stress, metabolism, and fat processing, potentially helping the isolated population adapt to warmer conditions than their northern counterparts.

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