Antarctic ice shelves are melting from below much faster than expected. A new study reveals that grooves under the ice trap warm water, creating a "heat trap" that could accelerate global sea level rise beyond current IPCC models.

Antarctic ice shelves are melting from below much faster than expected. A new study reveals that grooves under the ice trap warm water, creating a "heat trap" that could accelerate global sea level rise beyond current IPCC models.