This Monday, we saw a total solar eclipse throughout parts of the United States. However, such an event won’t reoccur forever. The moon will eventually drift far enough from Earth that it will no longer fully obstruct the sun. But predicting when this will happen has been difficult.

The New York Times had many experts weigh in on the subject, including EARTH Professor Brian Arbic.

You can read the full story, including quotes from Professor Arbic, in The New York Times here.