Nature World: These days the ocean is acidifying at a rate 10 times faster than it did during a similar upheaval 56 million years ago.
During those ancient days, researchers estimate that ocean acidity increased by about 100 percent in a few thousand years or more, and levels didn't bounce back to normal for another 70,000 years. Some species were able to adapt and evolve to such radical environmental changes, while others perished and died off. Also during this time, a wave of carbon dioxide (CO2) surged into...