Baby boy Cassian is an internet sensation . He was born earlier this year in the United States weighing 5.8 kilograms (12.8 pounds). But after his mum and the hospital shared the news recently, it wasn't long before headlines about the "giant" baby spread around the world. These included : 'Are you OK'?: Woman breaks record with giant newborn baby Record-breaking baby tips the scales at almost double the average size of a newborn While baby Cassian was born heavier than average, he's not unique.