If you were around in the '80s, you might recall the widespread fear over the discovery of a massive hole in the ozone layer over Antarctica.
The last time the ozone hole was this small was in 1988 when Bobby McFerrin was burning up the charts with "Don't Worry Be Happy" and acid-wash jeans were the height of fashion.
The ozone layer acts as a protective shroud over the Earth, blocking out ultraviolet radiation.
NASA and the US National Oceanic and Atmospheric Administration have been monitoring the ozone hole since it was first discovered in 1985.
The ozone hole changes throughout the year and reached its 2017 peak size on Sept. 11 at the end of the region's wintertime.
The ozone hole still covered 7.6 million square miles (nearly 20 million square kilometers), or over two and a half times the size of Australia.
Still, scientists are optimistic about the ozone hole eventually healing over time. »