Conversation so far:
Where was Aleksandr Solzhenitsyn born?
Aleksandr Solzhenitsyn was born in Kislovodsk, RSFSR (now in Stavropol Krai, Russia).
What year was Aleksandr Solzhenitsyn born?
Aleksandr Solzhenitsyn was born 11 December 1918.
What did Aleksandr Solzhenitsyn's parents do?
While in Moscow Taisiya Zakharovna met and married Isaakiy Semyonovich Solzhenitsyn, a young officer in the Imperial Russian Army of Cossack origin and fellow native of the Caucasus region.
Where did Aleksandr Solzhenitsyn go to school?
Aleksandr Solzhenitsyn studied mathematics and physics at Rostov State University.
What did Aleksandr Solzhenitsyn major in at Rostov State University?
Aleksandr Solzhenitsyn studied mathematics and physics at Rostov State University.
Did Aleksandr Solzhenitsyn get married?
On 7 April 1940, while at the university, Aleksandr Solzhenitsyn married Natalia Alekseevna Reshetovskaya.
Did Aleksandr Solzhenitsyn have any siblings?
In 1918, Taisiya Zakharovna became pregnant with Aleksandr Solzhenitsyn. On 15 June, shortly after her pregnancy was confirmed, Isaakiy Semyonovich Solzhenitsyn was killed in a hunting accident.

Question: What else is significant about his early years?
Self-contained rewrite: What else is significant about Aleksandr Solzhenitsyn's early years besides not having any siblings?