In this episode, we understand what are orphan or uncle blocks. This is more of a Proof of Work related concept where two blocks are produced at the same time. One of them becomes part of the chain - based on the longest chain consensus rule - while the other becomes and orphan (Bitcoin) or uncle (Ethereum 1.0) block.
Listen to the full episode to understand what eventually happens to these blocks and transactions inside them.
Episode 110 - Orphan or Uncle Blocks