Monozygotic Twins of Different Religions: Causes and Consequences/Twin Research Reviews: Language Development in Dizygotic Twins; MZ Twins with Hallermann-Streiff Syndrome; Digital Twins and Asthma Research; Zygosity Revealed/Human Interest: A Pen Turned Holocaust Children Into Twins; Identical Twin Jeopardy Winners; Twin Hostages Freed From Gaza; Loss of a Twin Son; Fraternal Twin Mountaineers; Twins in the Sydney to Hobart Yacht Race; Twin Patron Saints of Cobblers

Monozyotic (MZ) twins reared together are typically raised in the same religion, as are all children in a family. However, a young pair of MZ male twins, raised together, but with different religions, was identified and raises interesting issues that warrant consideration. This case, as well as those of reared-apart MZ twins who adopt different religions due to their family background or other circumstances, are summarized. A review of recent and current twin research follows. The studies included here concern language development in a pair of dizygotic (DZ) female twins, the second case of MZ twins with presumed Hallermann-Streiff syndrome, and the use of digital twins to advance asthma research. The final entry in the research section describes parents’ responses to their twin children’s misdiagnosed zygosity. Human interest stories involving twins — some entertaining, but all informative — include a pen that saved nontwin Holocaust children by assigning them as twins, identical twin Jeopardy winners, twin hostages freed from Gaza, loss of a twin son, fraternal twin mountaineers, twin sailors in the Sydney to Hobart Yacht Race, and the twin Patron Saints of Cobblers.