Alien Ocean Balls: Harvard Prof's Theory Debunked as Industrial Waste

A Harvard professor's claim that metal spherules found in the ocean were of alien origin has been challenged by a scientist who suggests they may be industrial waste from coal burning. The professor had previously suggested that the spherules were left behind by a meteorite, but an analysis of their chemical composition indicates they are consistent with coal ash. The professor has disputed this claim, stating that the spherules and coal ash have different compositions and that further analysis is needed to determine their nature.