The 18th International Twin Congress, and a Look at Twin Research in Wales/Twin Research Reviews: Temperamental Similarities and Twin Relations; Maximizing Twin Designs; Rare Tubal Ectopic Pregnancy; Twins' Academic Self-Concept Formation/In the Media: Identical Infant Twins Reunited; Birth of Identical-Fraternal Quadruplets; Identical Twin Comedians; 'Twice in a Lifetime': Meeting an Unrelated Look-Alike; Twins in the Tour de France.

The 18th International Society for Twin Studies convention took place between June 15-17, 2023, in Budapest, Hungary. A selective sampling of highlights from the meeting are presented. This is followed by a brief overview of ongoing twin research at the University of Aberystwyth in Wales and some twin treasures in the National Library. Next, reviews of timely research that examine temperamental similarities and twin relations, the maximization of twin research designs, a rare ectopic twin pregnancy, and twins' academic self-concept formation are presented. The final section covers stories appearing in various media sources that are informative, enlightening, and interesting, namely a reunion of identical infant twins, the birth of identical-fraternal quadruplets, identical twin comedians, meeting an unrelated look-alike, and twins in the Tour de France.