Recent research confirms that global sea levels are now rising faster than at any point in the last 4,000 years. Scientists reconstructed ancient sea levels using geological records, including corals, mangroves, and marine sediments. These records show that while sea levels have fluctuated over millennia, the speed of rise since the 20th century far exceeds historical rates. Modern measurements from satellites since 1993 show that sea levels have risen over 9 cm (3.6 inches), with the annual rat