Albert Einstein changed the way humanity understands the universe. He bent space and time. He reshaped physics. He became one of the most celebrated minds in history. But there is another story that rarely gets told.

Einstein's relationship with his sons was marked by distance and pain. After his divorce, his contact with them became sporadic at best. Hans Albert would later speak of feeling abandoned. Eduard, who struggled with mental illness, barely saw his father in his final decades.

A man who could explain the structure of the cosmos… but his own children felt his absence.