Just weeks before the Titanic shipwreck’s 100th anniversary, scientists have a new theory as to what might have helped spur modern history’s most famous maritime disaster.

A rare alignment of the sun, the full moon and Earth, may have set the April 14, 1912, tragedy in motion, according to a new report.

While it’s well-documented that the R.M.S. Titanic went down on a moonless night, the iceberg that sank the luxury liner might have been launched in part by a full moon that occurred three-and-a-half months earlier, scientists say.

Click here for the full report by National Geographic, including photos and animation showing how the doomed ship met its end.