In 25 years, Antarctica's ice shelves have lost twice as much ice as previously thought.

Since 1997, the ice shelves of Antarctica have lost not 6 trillion tons of ice, but 12 - that is, twice as much as scientists thought. NASA experts came to such conclusions. Ice shelves act as a support for melting ice, preventing it from reaching the ocean directly. Due to the loss of their mass, they have weakened, from this the rate of global sea level rise is increasing.