Historical clue formulations

• Vulcans, for one — 2025-10-04
• Vulcans, e.g. — 2024-06-21
• Xenomorphs, e.g. — 2021-10-15
• Side opposite 41-Across in a sci-fi clash — 2021-03-06
• Klingons, e.g. — 2017-07-30
• Time Lords, e.g. — 2017-01-14
• Vulcans, e.g. — 2010-03-13