NASA has been using satellites to record the minimum and maximum levels for sea ice in the Arctic Sea since 1978.
The sea ice minimum and maximums are a gauge to see how global warming is affecting the Arctic.
NASA has announced that the annual lowest extent of sea ice happened on September 10 and that sea ice extended for 1.60 million square miles on that date.
The minimum amount of sea ice in 2016 tied the amount of ice recorded back in 2007, which was the second lowest minimum sea ice amount on record.
NASA says that its satellite and researchers have recorded a steep decline in average sea ice extent in the Arctic Sea every month of the year.
Sea ice in the Arctic Sea is important according to NASA because it helps regulate the temperature of the planet and influences the circulation of the atmosphere and ocean.