Expedition Retrieves Spherules Possibly Originating Beyond the Solar System

Professor Avi Loeb, Frank B. Baird, Jr. Professor of Science at Harvard University, speaks on stage during a press conference at One World Observatory in New York, on April 12, 2016. Bryan Bedder/Getty Images for Breakthrough Prize Foundation

An expedition in the sea off the coast of Papua New Guinea discovered 50 tiny spherules in June that could possibly be the first interstellar objects found on Earth.

The expedition was led by Harvard University Astrophysicist Avi Loeb, and Rob McCallum of EYOS Expeditions coordinated the expedition, which lasted for almost two weeks, according to a statement.